RHSA-2026:77301
Vulnerability from csaf_redhat - Published: 2026-10-07 08:05 - Updated: 2026-10-07 10:26Summary
Red Hat Security Advisory: kernel security, bug fix, and enhancement update
Severity
Important
Notes
Topic: An update for kernel is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: smc: Fix use-after-free in tcp_write_timer_handler() (CVE-2023-53781)
* kernel: ALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events (CVE-2025-68347)
* kernel: xfrm: hold dev ref until after transport_finish NF_HOOK (CVE-2026-31663)
* kernel: Bluetooth: MGMT: validate LTK enc_size on load (CVE-2026-43020)
* kernel: Linux kernel: xfrm single-frag length not properly limited ()
* kernel: RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv (CVE-2026-46043)
* kernel: RDMA/rxe: Reject unknown opcodes before ICRC processing (CVE-2026-46133)
* kernel: sctp: purge outqueue on stale COOKIE-ECHO handling (CVE-2026-52924)
* kernel: xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx() (CVE-2026-53239)
* kernel: ip6: vti: Use ip6_tnl.net in vti6_siocdevprivate() (CVE-2026-63921)
* kernel: xfrm: input: hold netns during deferred transport reinjection (CVE-2026-63919)
* kernel: ip6: vti: Use ip6_tnl.net in vti6_changelink() (CVE-2026-63917)
* kernel: AMD-SN-7061: Safe RET Interrupt Vulnerability (CVE-2026-68480)
* kernel: RDMA/rxe: Fix a use-after-free problem in rxe_mmap (CVE-2026-64582)
* kernel: net: qrtr: restrict socket creation to the initial network namespace (CVE-2026-68294)
* kernel: xfrm: fix stale skb->prev after async crypto steals a GSO segment (CVE-2026-68426)
* kernel: netfilter: flowtable: publish GC-visible tuple last (CVE-2026-74746)
* kernel: RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp (CVE-2026-80864)
* kernel: RDMA/rxe: Fix OOB in free_rd_atomic_resources() (CVE-2026-80863)
Bug Fix(es) and Enhancement(s):
* scsi: mpt3sas: avoid freeing unallocated PCIe SGL buffers (JIRA:RHEL-256999)
* xfs corruption from [xfs_trans_cancel] during inode allocation (JIRA:RHEL-257187)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
In the Linux kernel, the following vulnerability has been resolved: smc: Fix use-after-free in tcp_write_timer_handler(). With Eric's ref tracker, syzbot finally found a repro for use-after-free in tcp_write_timer_handler() by kernel TCP sockets. [0] If SMC creates a kernel socket in __smc_create(), the kernel socket is supposed to be freed in smc_clcsock_release() by calling sock_release() when we close() the parent SMC socket. However, at the end of smc_clcsock_release(), the kernel socket's sk_state might not be TCP_CLOSE. This means that we have not called inet_csk_destroy_sock() in __tcp_close() and have not stopped the TCP timers. The kernel socket's TCP timers can be fired later, so we need to hold a refcnt for net as we do for MPTCP subflows in mptcp_subflow_create_socket(). [0]: leaked reference. sk_alloc (./include/net/net_namespace.h:335 net/core/sock.c:2108) inet_create (net/ipv4/af_inet.c:319 net/ipv4/af_inet.c:244) __sock_create (net/socket.c:1546) smc_create (net/smc/af_smc.c:3269 net/smc/af_smc.c:3284) __sock_create (net/socket.c:1546) __sys_socket (net/socket.c:1634 net/socket.c:1618 net/socket.c:1661) __x64_sys_socket (net/socket.c:1672) do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120) ================================================================== BUG: KASAN: slab-use-after-free in tcp_write_timer_handler (net/ipv4/tcp_timer.c:378 net/ipv4/tcp_timer.c:624 net/ipv4/tcp_timer.c:594) Read of size 1 at addr ffff888052b65e0d by task syzrepro/18091 CPU: 0 PID: 18091 Comm: syzrepro Tainted: G W 6.3.0-rc4-01174-gb5d54eb5899a #7 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-1.amzn2022.0.1 04/01/2014 Call Trace: <IRQ> dump_stack_lvl (lib/dump_stack.c:107) print_report (mm/kasan/report.c:320 mm/kasan/report.c:430) kasan_report (mm/kasan/report.c:538) tcp_write_timer_handler (net/ipv4/tcp_timer.c:378 net/ipv4/tcp_timer.c:624 net/ipv4/tcp_timer.c:594) tcp_write_timer (./include/linux/spinlock.h:390 net/ipv4/tcp_timer.c:643) call_timer_fn (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/timer.h:127 kernel/time/timer.c:1701) __run_timers.part.0 (kernel/time/timer.c:1752 kernel/time/timer.c:2022) run_timer_softirq (kernel/time/timer.c:2037) __do_softirq (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/irq.h:142 kernel/softirq.c:572) __irq_exit_rcu (kernel/softirq.c:445 kernel/softirq.c:650) irq_exit_rcu (kernel/softirq.c:664) sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1107 (discriminator 14)) </IRQ>
7.3 (High)
Affected products
Fixed
72 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:bpftool-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:bpftool-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:bpftool-debuginfo-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:bpftool-debuginfo-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-0:4.18.0-477.172.1.el8_8.src | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-abi-stablelists-0:4.18.0-477.172.1.el8_8.noarch | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-core-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-core-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-core-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-core-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-debuginfo-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-debuginfo-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-devel-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-devel-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-modules-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-modules-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-modules-extra-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-modules-extra-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debuginfo-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debuginfo-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debuginfo-common-ppc64le-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debuginfo-common-x86_64-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-devel-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-devel-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-doc-0:4.18.0-477.172.1.el8_8.noarch | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-modules-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-modules-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-modules-extra-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-modules-extra-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-debuginfo-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-debuginfo-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-libs-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-libs-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:perf-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:perf-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:perf-debuginfo-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:perf-debuginfo-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:python3-perf-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:python3-perf-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:python3-perf-debuginfo-0:4.18.0-477.172.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:python3-perf-debuginfo-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:bpftool-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:bpftool-debuginfo-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-0:4.18.0-477.172.1.el8_8.src | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-abi-stablelists-0:4.18.0-477.172.1.el8_8.noarch | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-core-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-core-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-debuginfo-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-devel-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-modules-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-modules-extra-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debuginfo-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debuginfo-common-x86_64-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-devel-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-doc-0:4.18.0-477.172.1.el8_8.noarch | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-modules-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-modules-extra-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-tools-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-tools-debuginfo-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-tools-libs-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:perf-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:perf-debuginfo-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:python3-perf-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:python3-perf-debuginfo-0:4.18.0-477.172.1.el8_8.x86_64 | — |
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Threats
Impact
Moderate
In the Linux kernel, the following vulnerability has been resolved: ALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events The DSP event handling code in hwdep_read() could write more bytes to the user buffer than requested, when a user provides a buffer smaller than the event header size (8 bytes). Fix by using min_t() to clamp the copy size, This ensures we never copy more than the user requested.
7.1 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2023-53781
Threats
Impact
Moderate
A flaw was found in the Linux kernel's `xfrm` (IP eXtensible FRamework) subsystem. This vulnerability involves a race condition where a network device's reference is released too early during packet processing after asynchronous cryptography. This premature release can lead to the system attempting to access a deallocated device, potentially causing a system crash (Denial of Service).
7.0 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2023-53781
Threats
Impact
Moderate
A flaw was found in the Linux kernel's Bluetooth management (MGMT) component. An attacker could exploit a vulnerability in how Long Term Keys (LTK) are loaded. By providing an oversized encryption size, a stack buffer overflow can occur, potentially leading to a denial of service.
7.3 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2023-53781
Threats
Impact
Moderate
A flaw was found in the Linux kernel's RDMA/rxe component. The `rxe_rcv()` function does not adequately validate the BTH pad and ICRC fields of incoming packets before calculating the payload size. A remote attacker could exploit this by sending a specially crafted short packet or a packet with a forged BTH pad. This could lead to an integer underflow, potentially causing unexpected behavior or a denial of service in the receive path.
7.0 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2023-53781
Threats
Impact
Moderate
A flaw was found in the Linux kernel's Soft RoCE (RDMA/rxe) driver. An unauthenticated remote attacker can send a specially crafted UDP packet with an unknown opcode to trigger an out-of-bounds read. This vulnerability can lead to a kernel panic, effectively causing a Denial of Service (DoS) on the affected system. The issue arises from insufficient validation of unknown opcodes before performing length arithmetic during Cyclic Redundancy Check (CRC) processing.
7.0 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2023-53781
Threats
Impact
Moderate
A flaw was found in the Linux kernel's Stream Control Transmission Protocol (SCTP) implementation. This vulnerability, a use-after-free, occurs when the system processes a Stale Cookie ERROR during the setup or reconfiguration of an SCTP association. A remote attacker could exploit this by sending specially crafted SCTP packets. This could lead to a system crash, causing a Denial of Service (DoS).
8.8 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2023-53781
Threats
Impact
Important
A flaw was found in the Linux kernel. A race condition exists in the `xfrm` policy handling, specifically within the `xfrm_policy_bysel_ctx()` function. This flaw allows for a use-after-free vulnerability, where memory is accessed after it has been released. This can lead to system instability or a denial of service (DoS), making the system unresponsive or causing it to crash.
7.0 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2023-53781
Threats
Impact
Moderate
A flaw was found in the Linux kernel's IPv6 Virtual Tunnel Interface (vti6) component. An unprivileged local user, particularly within a user namespace, could exploit a vulnerability related to incorrect network namespace handling during the movement of a vti6 tunnel. This issue can lead to a kernel bug, resulting in a denial of service (system crash) and potentially impacting container isolation on affected hosts.
7.0 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2023-53781
Threats
Impact
Important
A flaw was found in the Linux kernel's xfrm input component. The transport-mode reinjection process, which handles network packet re-injection, stores a network namespace pointer that must remain valid until a deferred callback completes. However, a missing reference count for the network namespace during this deferred operation could lead to a use-after-free vulnerability. This could allow an attacker to potentially cause a system crash or other unpredictable behavior if the network namespace is deallocated prematurely.
7.0 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2023-53781
Threats
Impact
Moderate
A flaw was found in the Linux kernel's IPv6 Virtual Tunnel Interface (VTI) module. When a VTI tunnel device is moved to a different network environment, an unprivileged user in a separate user space can manipulate tunnel parameters. This manipulation could allow the user to intercept or redirect network traffic intended for other parts of the system or other containers, leading to unauthorized information disclosure or denial of service across different tenants on a container host.
7.0 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2023-53781
Threats
Impact
Important
A flaw was found in the Linux kernel's RDMA/rxe component. A race condition in the `rxe_mmap()` function, which manages memory for Remote Direct Memory Access (RDMA) operations, can lead to a use-after-free vulnerability. A local attacker could exploit this timing issue to cause a system crash, resulting in a denial of service. In some scenarios, this could also potentially lead to a page-level use-after-free, which might allow for further system compromise.
7.8 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2023-53781
Threats
Impact
Important
A flaw was found in the Linux kernel's QRTR (Qualcomm IPC Router) networking component. An unprivileged local attacker can create a QRTR socket in a separate network namespace. Due to improper handling of global state variables, this allows the attacker to send datagrams and control-plane messages to QRTR sockets in other network namespaces. This bypasses network namespace isolation, enabling unauthorized communication and potential information disclosure between isolated network environments.
7.3 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2023-53781
Threats
Impact
Important
A flaw was found in the Linux kernel's `xfrm` subsystem. This vulnerability arises when asynchronous cryptographic operations incorrectly handle network packet segments, leaving a pointer to memory that has already been released. An attacker could potentially exploit this use-after-free condition to cause a system crash (denial of service) or, in some scenarios, execute unauthorized code.
7.3 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2023-53781
Threats
Impact
Important
An attacker executing code on affected system could inject an interrupt at a precise moment to disrupt "Safe RET", the default Linux mitigation for speculative Return Overflow (SRSO), which could potentially weaken that protection and may result in information disclosure.
8.8 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2023-53781
Threats
Impact
Important
A flaw was found in the netfilter flowtable component of the Linux kernel. This vulnerability occurs due to a timing issue where the system's garbage collection can free a network flow while it is still being set up. This can lead to a 'use-after-free' condition, where the system attempts to access memory that has already been released. This memory corruption could potentially result in a system crash (denial of service) or, in certain circumstances, allow for arbitrary code execution.
7.8 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2023-53781
Threats
Impact
Important
A flaw was found in the Linux kernel's RDMA/rxe component. A local user could exploit a memory corruption vulnerability in the `free_rd_atomic_resources()` function by updating the `max_dest_rd_atomic` value before the old array is properly freed, leading to an out-of-bounds write. This issue can cause a system crash, resulting in a denial of service (DoS).
7.3 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2023-53781
Threats
Impact
Moderate
A flaw was found in the Linux kernel's Remote Direct Memory Access (RDMA) subsystem, specifically within the rxe component. A local, unprivileged user could exploit a race condition during a queue pair modification operation. This could lead to a use-after-free vulnerability, allowing the attacker to cause a system crash and resulting in a Denial of Service (DoS).
7.0 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2023-53781
Threats
Impact
Moderate
References
111 references
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"cve": "CVE-2023-53781",
"cwe": {
"id": "CWE-825",
"name": "Expired Pointer Dereference"
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"discovery_date": "2025-12-09T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2420279"
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"notes": [
{
"category": "description",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmc: Fix use-after-free in tcp_write_timer_handler().\n\nWith Eric\u0027s ref tracker, syzbot finally found a repro for\nuse-after-free in tcp_write_timer_handler() by kernel TCP\nsockets. [0]\n\nIf SMC creates a kernel socket in __smc_create(), the kernel\nsocket is supposed to be freed in smc_clcsock_release() by\ncalling sock_release() when we close() the parent SMC socket.\n\nHowever, at the end of smc_clcsock_release(), the kernel\nsocket\u0027s sk_state might not be TCP_CLOSE. This means that\nwe have not called inet_csk_destroy_sock() in __tcp_close()\nand have not stopped the TCP timers.\n\nThe kernel socket\u0027s TCP timers can be fired later, so we\nneed to hold a refcnt for net as we do for MPTCP subflows\nin mptcp_subflow_create_socket().\n\n[0]:\nleaked reference.\n sk_alloc (./include/net/net_namespace.h:335 net/core/sock.c:2108)\n inet_create (net/ipv4/af_inet.c:319 net/ipv4/af_inet.c:244)\n __sock_create (net/socket.c:1546)\n smc_create (net/smc/af_smc.c:3269 net/smc/af_smc.c:3284)\n __sock_create (net/socket.c:1546)\n __sys_socket (net/socket.c:1634 net/socket.c:1618 net/socket.c:1661)\n __x64_sys_socket (net/socket.c:1672)\n do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)\n==================================================================\nBUG: KASAN: slab-use-after-free in tcp_write_timer_handler (net/ipv4/tcp_timer.c:378 net/ipv4/tcp_timer.c:624 net/ipv4/tcp_timer.c:594)\nRead of size 1 at addr ffff888052b65e0d by task syzrepro/18091\n\nCPU: 0 PID: 18091 Comm: syzrepro Tainted: G W 6.3.0-rc4-01174-gb5d54eb5899a #7\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-1.amzn2022.0.1 04/01/2014\nCall Trace:\n \u003cIRQ\u003e\n dump_stack_lvl (lib/dump_stack.c:107)\n print_report (mm/kasan/report.c:320 mm/kasan/report.c:430)\n kasan_report (mm/kasan/report.c:538)\n tcp_write_timer_handler (net/ipv4/tcp_timer.c:378 net/ipv4/tcp_timer.c:624 net/ipv4/tcp_timer.c:594)\n tcp_write_timer (./include/linux/spinlock.h:390 net/ipv4/tcp_timer.c:643)\n call_timer_fn (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/timer.h:127 kernel/time/timer.c:1701)\n __run_timers.part.0 (kernel/time/timer.c:1752 kernel/time/timer.c:2022)\n run_timer_softirq (kernel/time/timer.c:2037)\n __do_softirq (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/irq.h:142 kernel/softirq.c:572)\n __irq_exit_rcu (kernel/softirq.c:445 kernel/softirq.c:650)\n irq_exit_rcu (kernel/softirq.c:664)\n sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1107 (discriminator 14))\n \u003c/IRQ\u003e",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: smc: Fix use-after-free in tcp_write_timer_handler()",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2023-53781"
},
{
"category": "external",
"summary": "RHBZ#2420279",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2420279"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2023-53781",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-53781"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-53781",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53781"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025120939-CVE-2023-53781-cb1d@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025120939-CVE-2023-53781-cb1d@gregkh/T"
}
],
"release_date": "2025-12-09T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-07T08:05:21+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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},
"url": "https://access.redhat.com/errata/RHSA-2026:77301"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H",
"version": "3.1"
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],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: smc: Fix use-after-free in tcp_write_timer_handler()"
},
{
"cve": "CVE-2025-68347",
"cwe": {
"id": "CWE-787",
"name": "Out-of-bounds Write"
},
"discovery_date": "2025-12-24T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2424879"
}
],
"notes": [
{
"category": "description",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events\n\nThe DSP event handling code in hwdep_read() could write more bytes to\nthe user buffer than requested, when a user provides a buffer smaller\nthan the event header size (8 bytes).\n\nFix by using min_t() to clamp the copy size, This ensures we never copy\nmore than the user requested.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: ALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-68347"
},
{
"category": "external",
"summary": "RHBZ#2424879",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2424879"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-68347",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-68347"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-68347",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68347"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025122453-CVE-2025-68347-74dd@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025122453-CVE-2025-68347-74dd@gregkh/T"
}
],
"release_date": "2025-12-24T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-07T08:05:21+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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},
"url": "https://access.redhat.com/errata/RHSA-2026:77301"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: ALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events"
},
{
"cve": "CVE-2026-31663",
"cwe": {
"id": "CWE-826",
"name": "Premature Release of Resource During Expected Lifetime"
},
"discovery_date": "2026-04-24T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2461462"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s `xfrm` (IP eXtensible FRamework) subsystem. This vulnerability involves a race condition where a network device\u0027s reference is released too early during packet processing after asynchronous cryptography. This premature release can lead to the system attempting to access a deallocated device, potentially causing a system crash (Denial of Service).",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: xfrm: hold dev ref until after transport_finish NF_HOOK",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-31663"
},
{
"category": "external",
"summary": "RHBZ#2461462",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461462"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-31663",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-31663"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-31663",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31663"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026042404-CVE-2026-31663-164c@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026042404-CVE-2026-31663-164c@gregkh/T"
}
],
"release_date": "2026-04-24T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-07T08:05:21+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"restart_required": {
"category": "machine"
},
"url": "https://access.redhat.com/errata/RHSA-2026:77301"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
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}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: xfrm: hold dev ref until after transport_finish NF_HOOK"
},
{
"cve": "CVE-2026-43020",
"cwe": {
"id": "CWE-120",
"name": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)"
},
"discovery_date": "2026-05-01T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2464455"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s Bluetooth management (MGMT) component. An attacker could exploit a vulnerability in how Long Term Keys (LTK) are loaded. By providing an oversized encryption size, a stack buffer overflow can occur, potentially leading to a denial of service.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: Bluetooth: MGMT: validate LTK enc_size on load",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-43020"
},
{
"category": "external",
"summary": "RHBZ#2464455",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464455"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-43020",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-43020"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-43020",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43020"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026050157-CVE-2026-43020-3561@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026050157-CVE-2026-43020-3561@gregkh/T"
}
],
"release_date": "2026-05-01T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-07T08:05:21+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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},
"url": "https://access.redhat.com/errata/RHSA-2026:77301"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: Bluetooth: MGMT: validate LTK enc_size on load"
},
{
"cve": "CVE-2026-46043",
"cwe": {
"id": "CWE-191",
"name": "Integer Underflow (Wrap or Wraparound)"
},
"discovery_date": "2026-05-27T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2482127"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s RDMA/rxe component. The `rxe_rcv()` function does not adequately validate the BTH pad and ICRC fields of incoming packets before calculating the payload size. A remote attacker could exploit this by sending a specially crafted short packet or a packet with a forged BTH pad. This could lead to an integer underflow, potentially causing unexpected behavior or a denial of service in the receive path.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-46043"
},
{
"category": "external",
"summary": "RHBZ#2482127",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482127"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-46043",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-46043"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46043",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46043"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026052751-CVE-2026-46043-153e@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026052751-CVE-2026-46043-153e@gregkh/T"
}
],
"release_date": "2026-05-27T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-07T08:05:21+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"restart_required": {
"category": "machine"
},
"url": "https://access.redhat.com/errata/RHSA-2026:77301"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv"
},
{
"cve": "CVE-2026-46133",
"cwe": {
"id": "CWE-191",
"name": "Integer Underflow (Wrap or Wraparound)"
},
"discovery_date": "2026-05-28T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2482550"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s Soft RoCE (RDMA/rxe) driver. An unauthenticated remote attacker can send a specially crafted UDP packet with an unknown opcode to trigger an out-of-bounds read. This vulnerability can lead to a kernel panic, effectively causing a Denial of Service (DoS) on the affected system. The issue arises from insufficient validation of unknown opcodes before performing length arithmetic during Cyclic Redundancy Check (CRC) processing.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: RDMA/rxe: Reject unknown opcodes before ICRC processing",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-46133"
},
{
"category": "external",
"summary": "RHBZ#2482550",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482550"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-46133",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-46133"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46133",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46133"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026052818-CVE-2026-46133-09c3@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026052818-CVE-2026-46133-09c3@gregkh/T"
}
],
"release_date": "2026-05-28T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-07T08:05:21+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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},
"url": "https://access.redhat.com/errata/RHSA-2026:77301"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: RDMA/rxe: Reject unknown opcodes before ICRC processing"
},
{
"cve": "CVE-2026-52924",
"cwe": {
"id": "CWE-825",
"name": "Expired Pointer Dereference"
},
"discovery_date": "2026-06-24T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2492095"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s Stream Control Transmission Protocol (SCTP) implementation. This vulnerability, a use-after-free, occurs when the system processes a Stale Cookie ERROR during the setup or reconfiguration of an SCTP association. A remote attacker could exploit this by sending specially crafted SCTP packets. This could lead to a system crash, causing a Denial of Service (DoS).",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: sctp: purge outqueue on stale COOKIE-ECHO handling",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "A use after free can occur in the SCTP stale COOKIE-ECHO handling path when a Stale Cookie ERROR rolls an association back from COOKIE_ECHOED to COOKIE_WAIT while user data is already queued or bundled with COOKIE-ECHO. The stream update path can free the old stream state, while scheduler cached state such as stream out_curr or queued transmit state can still reference the freed sctp_stream_out entry. Later SCTP dequeue paths such as FCFS, RR, or PRIO may dereference the stale stream state and crash the kernel. The issue is network reachable but AC:H is used because the trigger depends on a specific association setup and stale cookie rollback sequence. Impact is remote denial of service.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-52924"
},
{
"category": "external",
"summary": "RHBZ#2492095",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492095"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-52924",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-52924"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-52924",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52924"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026062431-CVE-2026-52924-9f0b@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026062431-CVE-2026-52924-9f0b@gregkh/T"
}
],
"release_date": "2026-06-24T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-07T08:05:21+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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},
"url": "https://access.redhat.com/errata/RHSA-2026:77301"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options don\u0027t meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
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}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: sctp: purge outqueue on stale COOKIE-ECHO handling"
},
{
"cve": "CVE-2026-53239",
"cwe": {
"id": "CWE-364",
"name": "Signal Handler Race Condition"
},
"discovery_date": "2026-06-25T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2492779"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel. A race condition exists in the `xfrm` policy handling, specifically within the `xfrm_policy_bysel_ctx()` function. This flaw allows for a use-after-free vulnerability, where memory is accessed after it has been released. This can lead to system instability or a denial of service (DoS), making the system unresponsive or causing it to crash.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx()",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-53239"
},
{
"category": "external",
"summary": "RHBZ#2492779",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492779"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-53239",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-53239"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-53239",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53239"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026062510-CVE-2026-53239-8ebc@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026062510-CVE-2026-53239-8ebc@gregkh/T"
}
],
"release_date": "2026-06-25T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-07T08:05:21+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"restart_required": {
"category": "machine"
},
"url": "https://access.redhat.com/errata/RHSA-2026:77301"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx()"
},
{
"cve": "CVE-2026-63917",
"cwe": {
"id": "CWE-825",
"name": "Expired Pointer Dereference"
},
"discovery_date": "2026-07-19T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2502434"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s IPv6 Virtual Tunnel Interface (vti6) component. An unprivileged local user, particularly within a user namespace, could exploit a vulnerability related to incorrect network namespace handling during the movement of a vti6 tunnel. This issue can lead to a kernel bug, resulting in a denial of service (system crash) and potentially impacting container isolation on affected hosts.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: ip6: vti: Use ip6_tnl.net in vti6_changelink()",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "A stale per-network-namespace VTI6 tunnel entry can remain after a VTI6 device is moved between network namespaces because the update and changelink paths use the device\u0027s current network namespace instead of the tunnel\u0027s original namespace. When the original namespace is later destroyed, `cleanup_net()` may access the stale entry after the associated object has been freed, resulting in a use-after-free condition.\n\nThe vulnerability is considered to require low privileges (PR:L) because an unprivileged local user can reach the affected code path by creating user and network namespaces and obtaining the required capabilities within the newly created user namespace, where unprivileged user namespaces are enabled. Host-level `CAP_NET_ADMIN` is therefore not required. The issue is not remotely exploitable through network traffic; exploitation requires local netlink and network-namespace operations.\n\nSuccessful exploitation can cause a kernel crash and host-wide denial of service. Because the underlying flaw is a kernel use-after-free, confidentiality and integrity impacts may also be possible, although privilege escalation has not been demonstrated. The practical impact can be greater on container hosts because an unprivileged workload with access to user and network namespaces may trigger the flaw in the shared host kernel, potentially affecting other containers or tenants outside the attacker\u0027s own namespace.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-63917"
},
{
"category": "external",
"summary": "RHBZ#2502434",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502434"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-63917",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-63917"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63917",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63917"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026071947-CVE-2026-63917-4a8f@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026071947-CVE-2026-63917-4a8f@gregkh/T"
}
],
"release_date": "2026-07-19T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-07T08:05:21+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"restart_required": {
"category": "machine"
},
"url": "https://access.redhat.com/errata/RHSA-2026:77301"
},
{
"category": "workaround",
"details": "To mitigate this issue, prevent module ip6_vti from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: ip6: vti: Use ip6_tnl.net in vti6_changelink()"
},
{
"cve": "CVE-2026-63919",
"cwe": {
"id": "CWE-911",
"name": "Improper Update of Reference Count"
},
"discovery_date": "2026-07-19T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2502412"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s xfrm input component. The transport-mode reinjection process, which handles network packet re-injection, stores a network namespace pointer that must remain valid until a deferred callback completes. However, a missing reference count for the network namespace during this deferred operation could lead to a use-after-free vulnerability. This could allow an attacker to potentially cause a system crash or other unpredictable behavior if the network namespace is deallocated prematurely.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: xfrm: input: hold netns during deferred transport reinjection",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-63919"
},
{
"category": "external",
"summary": "RHBZ#2502412",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502412"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-63919",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-63919"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63919",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63919"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026071947-CVE-2026-63919-e224@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026071947-CVE-2026-63919-e224@gregkh/T"
}
],
"release_date": "2026-07-19T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-07T08:05:21+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"restart_required": {
"category": "machine"
},
"url": "https://access.redhat.com/errata/RHSA-2026:77301"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: xfrm: input: hold netns during deferred transport reinjection"
},
{
"cve": "CVE-2026-63921",
"cwe": {
"id": "CWE-653",
"name": "Improper Isolation or Compartmentalization"
},
"discovery_date": "2026-07-19T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2502368"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s IPv6 Virtual Tunnel Interface (VTI) module. When a VTI tunnel device is moved to a different network environment, an unprivileged user in a separate user space can manipulate tunnel parameters. This manipulation could allow the user to intercept or redirect network traffic intended for other parts of the system or other containers, leading to unauthorized information disclosure or denial of service across different tenants on a container host.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: ip6: vti: Use ip6_tnl.net in vti6_siocdevprivate()",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-63921"
},
{
"category": "external",
"summary": "RHBZ#2502368",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502368"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-63921",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-63921"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63921",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63921"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026071948-CVE-2026-63921-ea11@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026071948-CVE-2026-63921-ea11@gregkh/T"
}
],
"release_date": "2026-07-19T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-07T08:05:21+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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},
"url": "https://access.redhat.com/errata/RHSA-2026:77301"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: ip6: vti: Use ip6_tnl.net in vti6_siocdevprivate()"
},
{
"cve": "CVE-2026-64582",
"cwe": {
"id": "CWE-825",
"name": "Expired Pointer Dereference"
},
"discovery_date": "2026-08-05T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2511448"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s RDMA/rxe component. A race condition in the `rxe_mmap()` function, which manages memory for Remote Direct Memory Access (RDMA) operations, can lead to a use-after-free vulnerability. A local attacker could exploit this timing issue to cause a system crash, resulting in a denial of service. In some scenarios, this could also potentially lead to a page-level use-after-free, which might allow for further system compromise.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: RDMA/rxe: Fix a use-after-free problem in rxe_mmap",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-64582"
},
{
"category": "external",
"summary": "RHBZ#2511448",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2511448"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-64582",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-64582"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-64582",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64582"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026080518-CVE-2026-64582-9922@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026080518-CVE-2026-64582-9922@gregkh/T"
}
],
"release_date": "2026-08-05T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-07T08:05:21+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"restart_required": {
"category": "machine"
},
"url": "https://access.redhat.com/errata/RHSA-2026:77301"
},
{
"category": "workaround",
"details": "To mitigate this issue, prevent the `rxe` kernel module from loading. This can be achieved by blacklisting the module.\n\nCreate a file named `/etc/modprobe.d/blacklist-rxe.conf` with the following content:\n```\nblacklist rxe\n```\n\nAfter creating the file, regenerate the initramfs and reboot the system for the changes to take effect. This mitigation may impact functionality that relies on the RDMA/rxe module.",
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}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: RDMA/rxe: Fix a use-after-free problem in rxe_mmap"
},
{
"cve": "CVE-2026-68294",
"cwe": {
"id": "CWE-653",
"name": "Improper Isolation or Compartmentalization"
},
"discovery_date": "2026-08-10T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2513353"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s QRTR (Qualcomm IPC Router) networking component. An unprivileged local attacker can create a QRTR socket in a separate network namespace. Due to improper handling of global state variables, this allows the attacker to send datagrams and control-plane messages to QRTR sockets in other network namespaces. This bypasses network namespace isolation, enabling unauthorized communication and potential information disclosure between isolated network environments.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: net: qrtr: restrict socket creation to the initial network namespace",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-68294"
},
{
"category": "external",
"summary": "RHBZ#2513353",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513353"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-68294",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-68294"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-68294",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68294"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026081028-CVE-2026-68294-d225@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026081028-CVE-2026-68294-d225@gregkh/T"
}
],
"release_date": "2026-08-10T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-07T08:05:21+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"restart_required": {
"category": "machine"
},
"url": "https://access.redhat.com/errata/RHSA-2026:77301"
},
{
"category": "workaround",
"details": "To mitigate this issue, prevent the `qrtr` kernel module from loading. Create a file `/etc/modprobe.d/blacklist-qrtr.conf` with the content `blacklist qrtr`. A system reboot is required for this change to take effect. This may impact functionality that relies on the QRTR inter-process communication mechanism, such as communication with modems or other remote processors.",
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}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: net: qrtr: restrict socket creation to the initial network namespace"
},
{
"cve": "CVE-2026-68426",
"cwe": {
"id": "CWE-825",
"name": "Expired Pointer Dereference"
},
"discovery_date": "2026-08-10T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2513477"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s `xfrm` subsystem. This vulnerability arises when asynchronous cryptographic operations incorrectly handle network packet segments, leaving a pointer to memory that has already been released. An attacker could potentially exploit this use-after-free condition to cause a system crash (denial of service) or, in some scenarios, execute unauthorized code.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: xfrm: fix stale skb-\u003eprev after async crypto steals a GSO segment",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-68426"
},
{
"category": "external",
"summary": "RHBZ#2513477",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513477"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-68426",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-68426"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-68426",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68426"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026081053-CVE-2026-68426-9cce@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026081053-CVE-2026-68426-9cce@gregkh/T"
}
],
"release_date": "2026-08-10T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-07T08:05:21+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"restart_required": {
"category": "machine"
},
"url": "https://access.redhat.com/errata/RHSA-2026:77301"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: xfrm: fix stale skb-\u003eprev after async crypto steals a GSO segment"
},
{
"cve": "CVE-2026-68480",
"cwe": {
"id": "CWE-201",
"name": "Insertion of Sensitive Information Into Sent Data"
},
"discovery_date": "2026-07-29T10:29:26.999000+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2508363"
}
],
"notes": [
{
"category": "description",
"text": "An attacker executing code on affected system could inject an interrupt at a precise moment to disrupt \"Safe RET\", the default Linux mitigation for speculative Return Overflow (SRSO), which could potentially weaken that protection and may result in information disclosure.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: AMD-SN-7061: Safe RET Interrupt Vulnerability",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-68480"
},
{
"category": "external",
"summary": "RHBZ#2508363",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2508363"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-68480",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-68480"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-68480",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68480"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026080631-CVE-2026-68480-ad40@gregkh/",
"url": "https://lore.kernel.org/linux-cve-announce/2026080631-CVE-2026-68480-ad40@gregkh/"
}
],
"release_date": "2026-08-06T12:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-07T08:05:21+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"restart_required": {
"category": "machine"
},
"url": "https://access.redhat.com/errata/RHSA-2026:77301"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: AMD-SN-7061: Safe RET Interrupt Vulnerability"
},
{
"cve": "CVE-2026-74746",
"cwe": {
"id": "CWE-825",
"name": "Expired Pointer Dereference"
},
"discovery_date": "2026-08-26T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2524483"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the netfilter flowtable component of the Linux kernel. This vulnerability occurs due to a timing issue where the system\u0027s garbage collection can free a network flow while it is still being set up. This can lead to a \u0027use-after-free\u0027 condition, where the system attempts to access memory that has already been released. This memory corruption could potentially result in a system crash (denial of service) or, in certain circumstances, allow for arbitrary code execution.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: netfilter: flowtable: publish GC-visible tuple last",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-74746"
},
{
"category": "external",
"summary": "RHBZ#2524483",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2524483"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-74746",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74746"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-74746",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74746"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026082658-CVE-2026-74746-c2f9@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026082658-CVE-2026-74746-c2f9@gregkh/T"
}
],
"release_date": "2026-08-26T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-07T08:05:21+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"restart_required": {
"category": "machine"
},
"url": "https://access.redhat.com/errata/RHSA-2026:77301"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: netfilter: flowtable: publish GC-visible tuple last"
},
{
"cve": "CVE-2026-80863",
"cwe": {
"id": "CWE-787",
"name": "Out-of-bounds Write"
},
"discovery_date": "2026-09-04T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2528665"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s RDMA/rxe component. A local user could exploit a memory corruption vulnerability in the `free_rd_atomic_resources()` function by updating the `max_dest_rd_atomic` value before the old array is properly freed, leading to an out-of-bounds write. This issue can cause a system crash, resulting in a denial of service (DoS).",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: RDMA/rxe: Fix OOB in free_rd_atomic_resources()",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "An OOB write in RDMA/RXE free_rd_atomic_resources can occur because qp attr max_dest_rd_atomic is updated before the old rd atomic resources array is freed. The free path then uses the new larger bound while walking the old smaller allocation, which can write past the kmalloc object and corrupt slab memory. The issue is not directly network reachable because the triggering operation is a local uverbs control path rather than inbound RDMA traffic.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-80863"
},
{
"category": "external",
"summary": "RHBZ#2528665",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2528665"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-80863",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-80863"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-80863",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80863"
},
{
"category": "external",
"summary": "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80863.mbox",
"url": "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80863.mbox"
}
],
"release_date": "2026-09-04T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-07T08:05:21+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"url": "https://access.redhat.com/errata/RHSA-2026:77301"
},
{
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"details": "To mitigate this issue, prevent module rdma_rxe from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: RDMA/rxe: Fix OOB in free_rd_atomic_resources()"
},
{
"cve": "CVE-2026-80864",
"cwe": {
"id": "CWE-825",
"name": "Expired Pointer Dereference"
},
"discovery_date": "2026-09-04T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2528646"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s Remote Direct Memory Access (RDMA) subsystem, specifically within the rxe component. A local, unprivileged user could exploit a race condition during a queue pair modification operation. This could lead to a use-after-free vulnerability, allowing the attacker to cause a system crash and resulting in a Denial of Service (DoS).",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-80864"
},
{
"category": "external",
"summary": "RHBZ#2528646",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2528646"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-80864",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-80864"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-80864",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80864"
},
{
"category": "external",
"summary": "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80864.mbox",
"url": "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80864.mbox"
}
],
"release_date": "2026-09-04T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-07T08:05:21+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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"restart_required": {
"category": "machine"
},
"url": "https://access.redhat.com/errata/RHSA-2026:77301"
},
{
"category": "workaround",
"details": "To mitigate this issue, prevent the rdma_rxe kernel module from being loaded.\n\n1. Create a configuration file in /etc/modprobe.d to disable loading of the module:\n# echo \"install rdma_rxe /bin/true\" \u003e /etc/modprobe.d/disable-rdma_rxe.conf\n\n2. If the module is currently loaded, attempt to unload it:\n# modprobe -r rdma_rxe\n\nCaveats:\nDisabling this module prevents the creation and operation of software RDMA over Converged Ethernet (Soft-RoCE) devices. Applications requiring rdma_rxe will fail to initialize. If the module is currently in active use and cannot be unloaded dynamically, a system reboot is required to ensure the module is fully disabled.",
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}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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