RHSA-2026:25533

Vulnerability from csaf_redhat - Published: 2026-06-12 19:56 - Updated: 2026-11-09 22:52
Summary
Red Hat Security Advisory: kernel security update
Severity
Critical
Notes
Topic: An update for kernel is now available for Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On and Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support. Red Hat Product Security has rated this update as having a security impact of Critical. 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: nvme: avoid double free special payload (CVE-2024-41073) * kernel: sctp: fix a potential overflow in sctp_ifwdtsn_skip (CVE-2023-53372) * kernel: net: use dst_dev_rcu() in sk_setup_caps() (CVE-2025-40170) * kernel: ipv6: use RCU in ip6_xmit() (CVE-2025-40135) * kernel: ipv6: use RCU in ip6_output() (CVE-2025-40158) * kernel: nbd: defer config unlock in nbd_genl_connect (CVE-2025-68366) * kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id (CVE-2025-68724) * kernel: iommu: disable SVA when CONFIG_X86 is set (CVE-2025-71089) * kernel: macvlan: fix possible UAF in macvlan_forward_source() (CVE-2026-23001) * kernel: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() (CVE-2026-23216) * kernel: can: raw: fix ro->uniq use-after-free in raw_rcv() (CVE-2026-31532) * kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685) * kernel: ip6_tunnel: clear skb2->cb[] in ip4ip6_err() (CVE-2026-43037) * kernel: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() (CVE-2026-43038) * kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110) * kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190) 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.
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CVE-2023-53372

A flaw was found in the Linux kernel's Stream Control Transmission Protocol (SCTP) implementation. An attacker can trigger a Denial of Service (DoS) or potentially expose sensitive kernel memory by sending malformed SCTP packets. Because the kernel fails to properly validate buffer boundaries when processing incoming data chunks, an out-of-bounds memory read occurs. This vulnerability can lead to a system crash, disrupting services on the affected host.

7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE-125 - Out-of-bounds Read
Affected products
Product Identifier Version Remediation
Unresolved product id: BaseOS-8.6.0.Z.AUS:bpftool-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:bpftool-debuginfo-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:kernel-0:4.18.0-372.195.1.el8_6.src —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:kernel-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:kernel-abi-stablelists-0:4.18.0-372.195.1.el8_6.noarch —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:kernel-core-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:kernel-debug-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:kernel-debug-core-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:kernel-debug-debuginfo-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:kernel-debug-devel-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:kernel-debug-modules-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:kernel-debug-modules-extra-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:kernel-debuginfo-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:kernel-debuginfo-common-x86_64-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:kernel-devel-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:kernel-doc-0:4.18.0-372.195.1.el8_6.noarch —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:kernel-modules-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:kernel-modules-extra-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:kernel-tools-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:kernel-tools-debuginfo-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:kernel-tools-libs-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:perf-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:perf-debuginfo-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:python3-perf-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.AUS:python3-perf-debuginfo-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:bpftool-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:bpftool-debuginfo-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:kernel-0:4.18.0-372.195.1.el8_6.src —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:kernel-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:kernel-abi-stablelists-0:4.18.0-372.195.1.el8_6.noarch —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:kernel-core-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:kernel-debug-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:kernel-debug-core-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:kernel-debug-debuginfo-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:kernel-debug-devel-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:kernel-debug-modules-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:kernel-debug-modules-extra-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:kernel-debuginfo-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:kernel-debuginfo-common-x86_64-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:kernel-devel-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:kernel-doc-0:4.18.0-372.195.1.el8_6.noarch —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:kernel-modules-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:kernel-modules-extra-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:kernel-tools-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:kernel-tools-debuginfo-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:kernel-tools-libs-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:perf-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:perf-debuginfo-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:python3-perf-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Unresolved product id: BaseOS-8.6.0.Z.EUS.EXTENSION:python3-perf-debuginfo-0:4.18.0-372.195.1.el8_6.x86_64 —
Vendor Fix fix
Threats
Impact Moderate
CVE-2024-41073

A flaw was found in the Linux kernel's NVMe component. This vulnerability is due to a double free error that occurs when a discard request needs to be retried and fails before a new special payload is added. A local attacker could exploit this memory corruption issue to cause a denial of service (DoS).

5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-1341 - Multiple Releases of Same Resource or Handle
Affected products
Fixed 50 products, the same list as for CVE-2023-53372
Threats
Impact Moderate
CVE-2025-40135

A use-after-free flaw was found in ip6_autoflowlabel in the Linux kernel's net/ipv6/ip6_output.c code. In this flaw an attacker can cause a denial of service (DoS) attack.

7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-825 - Expired Pointer Dereference
Affected products
Fixed 50 products, the same list as for CVE-2023-53372
Threats
Impact Moderate
CVE-2025-40158

A use-after-free flaw was found in ip6_finish_output2 in net/ipv6/ip6_output.c in ipv6 access. This flaw could allow an attacker to crash the system at device disconnect. This vulnerability could even lead to a kernel information leak problem.

7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-825 - Expired Pointer Dereference
Affected products
Fixed 50 products, the same list as for CVE-2023-53372
Threats
Impact Moderate
CVE-2025-40170

A flaw was found in the Linux kernel's networking subsystem. A local attacker could exploit this vulnerability to escalate privileges or cause a Denial of Service (DoS) through a kernel crash. By rapidly altering network routes while establishing socket connections, an attacker triggers a race condition where the kernel accesses device memory that has already been freed due to a lack of proper synchronization.

7.4 (High)
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-416 - Use After Free
Affected products
Fixed 50 products, the same list as for CVE-2023-53372
Threats
Impact Moderate
CVE-2025-68366

In the Linux kernel, the following vulnerability has been resolved: nbd: defer config unlock in nbd_genl_connect There is one use-after-free warning when running NBD_CMD_CONNECT and NBD_CLEAR_SOCK: nbd_genl_connect nbd_alloc_and_init_config // config_refs=1 nbd_start_device // config_refs=2 set NBD_RT_HAS_CONFIG_REF open nbd // config_refs=3 recv_work done // config_refs=2 NBD_CLEAR_SOCK // config_refs=1 close nbd // config_refs=0 refcount_inc -> uaf ------------[ cut here ]------------ refcount_t: addition on 0; use-after-free. WARNING: CPU: 24 PID: 1014 at lib/refcount.c:25 refcount_warn_saturate+0x12e/0x290 nbd_genl_connect+0x16d0/0x1ab0 genl_family_rcv_msg_doit+0x1f3/0x310 genl_rcv_msg+0x44a/0x790 The issue can be easily reproduced by adding a small delay before refcount_inc(&nbd->config_refs) in nbd_genl_connect(): mutex_unlock(&nbd->config_lock); if (!ret) { set_bit(NBD_RT_HAS_CONFIG_REF, &config->runtime_flags); + printk("before sleep\n"); + mdelay(5 * 1000); + printk("after sleep\n"); refcount_inc(&nbd->config_refs); nbd_connect_reply(info, nbd->index); }

7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE-911 - Improper Update of Reference Count
Affected products
Fixed 50 products, the same list as for CVE-2023-53372
Threats
Impact Moderate
CVE-2025-68724

A flaw was found in the Linux kernel's asymmetric keys subsystem. An integer overflow in the asymmetric_key_generate_id function can lead to memory corruption when calculating buffer sizes for asymmetric key identifiers. A local attacker with privileges to load cryptographic certificates into the kernel keyring could exploit this flaw by providing a crafted X.509 certificate with oversized fields. This could result in a Denial of Service (DoS) through a system crash or unauthorized memory disclosure.

7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE-190 - Integer Overflow or Wraparound
Affected products
Fixed 50 products, the same list as for CVE-2023-53372
Threats
Impact Moderate
CVE-2025-71089

A security vulnerability was found in the Linux kernel's IOMMU Shared Virtual Addressing (SVA) implementation on x86 architecture. When SVA is enabled, the IOMMU caches kernel page table entries. Since the kernel lacks a mechanism to notify the IOMMU when kernel page table pages are freed and reallocated, the IOMMU can retain stale entries pointing to reused memory. This can lead to use-after-free or write-after-free conditions, potentially enabling arbitrary physical memory DMA access or privilege escalation.

6.6 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
CWE-820 - Missing Synchronization
Affected products
Fixed 50 products, the same list as for CVE-2023-53372
Threats
Impact Moderate
CVE-2026-23001

A flaw was found in the Linux kernel's macvlan driver. This vulnerability occurs when a network source entry is deleted while network traffic is actively being forwarded without proper synchronization, resulting in a use-after-free condition. A local attacker with network administration privileges can exploit this race condition to crash the system, causing a Denial of Service (DoS), or potentially achieve privilege escalation.

7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 - Use After Free
Affected products
Fixed 50 products, the same list as for CVE-2023-53372
Threats
Impact Moderate
CVE-2026-23216

A use-after-free flaw was found in the Linux kernel's iSCSI target subsystem. In the iscsit_dec_conn_usage_count() function, complete() is called while still holding the conn->conn_usage_lock spinlock. The waiting thread (such as iscsit_close_connection()) may wake up immediately and free the iscsit_conn structure before the current thread executes spin_unlock_bh(), resulting in a use-after-free when attempting to release the lock on already-freed memory.

7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-413 - Improper Resource Locking
Affected products
Fixed 50 products, the same list as for CVE-2023-53372
Threats
Impact Moderate
CVE-2026-31532

A flaw was found in the Linux kernel's Controller Area Network (CAN) raw socket implementation. A use-after-free vulnerability can occur due to a timing window during the unregistration of CAN receive filters, allowing a freed memory region to be accessed. This could lead to system instability or a denial of service (DoS).

7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE-366 - Race Condition within a Thread
Affected products
Fixed 50 products, the same list as for CVE-2023-53372
Threats
Impact Moderate
CVE-2026-31685

A flaw was found in the Linux kernel's netfilter component. This vulnerability occurs because the `eui64_mt6()` function, which processes IPv6 packets, does not properly validate the MAC header for all packets. Specifically, packets with a zero fragment offset could bypass an existing guard, allowing the system to attempt to access an invalid MAC header. A remote attacker could exploit this by sending specially crafted IPv6 packets, potentially causing a system crash and leading to a Denial of Service (DoS).

7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE-1287 - Improper Validation of Specified Type of Input
Affected products
Fixed 50 products, the same list as for CVE-2023-53372
Threats
Impact Moderate
CVE-2026-43037

A flaw was found in the Linux kernel's IPv6 tunnel implementation. A remote attacker could exploit this flaw by sending malicious ICMPv6 error messages to cause a stack-based buffer overflow in the kernel's IPv4-over-IPv6 tunnel error handling code. This could result in a kernel crash (denial of service) or potentially allow arbitrary code execution with kernel privileges.

8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-843 - Access of Resource Using Incompatible Type
Affected products
Fixed 50 products, the same list as for CVE-2023-53372
Threats
Impact Critical
CVE-2026-43038

A flaw was found in the Linux kernel's IPv6 ICMP error generation. A remote attacker could send a specially crafted IPv4 ICMP error packet with a Common Internet Protocol Security Option (CIPSO) IP option. This could lead to incorrect handling of packet control block data when generating an IPv6 ICMP error, potentially causing an out-of-bounds memory access. This memory corruption could result in information disclosure or a denial of service.

7.3 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
CWE-843 - Access of Resource Using Incompatible Type
Affected products
Fixed 50 products, the same list as for CVE-2023-53372
Threats
Impact Important
CVE-2026-43110

A flaw was found in the Linux kernel's brcmfmac Wi-Fi driver. This vulnerability occurs because the driver fails to properly validate bsscfg indices in interface (IF) events. An attacker could exploit this by sending a specially crafted IF event with an invalid bsscfg index, which could lead to an out-of-bounds write or read, potentially causing a system crash and resulting in a denial of service (DoS).

8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-1285 - Improper Validation of Specified Index, Position, or Offset in Input
Affected products
Fixed 50 products, the same list as for CVE-2023-53372
Threats
Impact Moderate
CVE-2026-43190

A flaw was found in the Linux kernel, specifically within the netfilter: xt_tcpmss module. A remote attacker could exploit this vulnerability by sending a specially crafted TCP packet. The TCP option parser does not properly validate the remaining option length, which results in an out-of-bounds read. This allows an attacker to access memory beyond the intended buffer, potentially leading to information disclosure.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE-125 - Out-of-bounds Read
Affected products
Fixed 50 products, the same list as for CVE-2023-53372
Threats
Impact Moderate
References
URL Category
https://access.redhat.com/errata/RHSA-2026:25533 self
https://access.redhat.com/security/updates/classi… external
https://bugzilla.redhat.com/show_bug.cgi?id=2301637 external
https://bugzilla.redhat.com/show_bug.cgi?id=2396405 external
https://bugzilla.redhat.com/show_bug.cgi?id=2414506 external
https://bugzilla.redhat.com/show_bug.cgi?id=2414521 external
https://bugzilla.redhat.com/show_bug.cgi?id=2414523 external
https://bugzilla.redhat.com/show_bug.cgi?id=2424881 external
https://bugzilla.redhat.com/show_bug.cgi?id=2424886 external
https://bugzilla.redhat.com/show_bug.cgi?id=2429104 external
https://bugzilla.redhat.com/show_bug.cgi?id=2432664 external
https://bugzilla.redhat.com/show_bug.cgi?id=2440630 external
https://bugzilla.redhat.com/show_bug.cgi?id=2461107 external
https://bugzilla.redhat.com/show_bug.cgi?id=2461759 external
https://bugzilla.redhat.com/show_bug.cgi?id=2464351 external
https://bugzilla.redhat.com/show_bug.cgi?id=2464397 external
https://bugzilla.redhat.com/show_bug.cgi?id=2467014 external
https://bugzilla.redhat.com/show_bug.cgi?id=2467064 external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2023-53372 self
https://bugzilla.redhat.com/show_bug.cgi?id=2396405 external
https://www.cve.org/CVERecord?id=CVE-2023-53372 external
https://nvd.nist.gov/vuln/detail/CVE-2023-53372 external
https://lore.kernel.org/linux-cve-announce/202509… external
https://access.redhat.com/security/cve/CVE-2024-41073 self
https://bugzilla.redhat.com/show_bug.cgi?id=2301637 external
https://www.cve.org/CVERecord?id=CVE-2024-41073 external
https://nvd.nist.gov/vuln/detail/CVE-2024-41073 external
https://lore.kernel.org/linux-cve-announce/202407… external
https://access.redhat.com/security/cve/CVE-2025-40135 self
https://bugzilla.redhat.com/show_bug.cgi?id=2414521 external
https://www.cve.org/CVERecord?id=CVE-2025-40135 external
https://nvd.nist.gov/vuln/detail/CVE-2025-40135 external
https://lore.kernel.org/linux-cve-announce/202511… external
https://access.redhat.com/security/cve/CVE-2025-40158 self
https://bugzilla.redhat.com/show_bug.cgi?id=2414523 external
https://www.cve.org/CVERecord?id=CVE-2025-40158 external
https://nvd.nist.gov/vuln/detail/CVE-2025-40158 external
https://lore.kernel.org/linux-cve-announce/202511… external
https://access.redhat.com/security/cve/CVE-2025-40170 self
https://bugzilla.redhat.com/show_bug.cgi?id=2414506 external
https://www.cve.org/CVERecord?id=CVE-2025-40170 external
https://nvd.nist.gov/vuln/detail/CVE-2025-40170 external
https://lore.kernel.org/linux-cve-announce/202511… external
https://access.redhat.com/security/cve/CVE-2025-68366 self
https://bugzilla.redhat.com/show_bug.cgi?id=2424881 external
https://www.cve.org/CVERecord?id=CVE-2025-68366 external
https://nvd.nist.gov/vuln/detail/CVE-2025-68366 external
https://lore.kernel.org/linux-cve-announce/202512… external
https://access.redhat.com/security/cve/CVE-2025-68724 self
https://bugzilla.redhat.com/show_bug.cgi?id=2424886 external
https://www.cve.org/CVERecord?id=CVE-2025-68724 external
https://nvd.nist.gov/vuln/detail/CVE-2025-68724 external
https://lore.kernel.org/linux-cve-announce/202512… external
https://access.redhat.com/security/cve/CVE-2025-71089 self
https://bugzilla.redhat.com/show_bug.cgi?id=2429104 external
https://www.cve.org/CVERecord?id=CVE-2025-71089 external
https://nvd.nist.gov/vuln/detail/CVE-2025-71089 external
https://lore.kernel.org/linux-cve-announce/202601… external
https://access.redhat.com/security/cve/CVE-2026-23001 self
https://bugzilla.redhat.com/show_bug.cgi?id=2432664 external
https://www.cve.org/CVERecord?id=CVE-2026-23001 external
https://nvd.nist.gov/vuln/detail/CVE-2026-23001 external
https://lore.kernel.org/linux-cve-announce/202601… external
https://access.redhat.com/security/cve/CVE-2026-23216 self
https://bugzilla.redhat.com/show_bug.cgi?id=2440630 external
https://www.cve.org/CVERecord?id=CVE-2026-23216 external
https://nvd.nist.gov/vuln/detail/CVE-2026-23216 external
https://lore.kernel.org/linux-cve-announce/202602… external
https://access.redhat.com/security/cve/CVE-2026-31532 self
https://bugzilla.redhat.com/show_bug.cgi?id=2461107 external
https://www.cve.org/CVERecord?id=CVE-2026-31532 external
https://nvd.nist.gov/vuln/detail/CVE-2026-31532 external
https://lore.kernel.org/linux-cve-announce/202604… external
https://access.redhat.com/security/cve/CVE-2026-31685 self
https://bugzilla.redhat.com/show_bug.cgi?id=2461759 external
https://www.cve.org/CVERecord?id=CVE-2026-31685 external
https://nvd.nist.gov/vuln/detail/CVE-2026-31685 external
https://lore.kernel.org/linux-cve-announce/202604… external
https://access.redhat.com/security/cve/CVE-2026-43037 self
https://bugzilla.redhat.com/show_bug.cgi?id=2464351 external
https://www.cve.org/CVERecord?id=CVE-2026-43037 external
https://nvd.nist.gov/vuln/detail/CVE-2026-43037 external
https://lore.kernel.org/linux-cve-announce/202605… external
https://access.redhat.com/security/cve/CVE-2026-43038 self
https://bugzilla.redhat.com/show_bug.cgi?id=2464397 external
https://www.cve.org/CVERecord?id=CVE-2026-43038 external
https://nvd.nist.gov/vuln/detail/CVE-2026-43038 external
https://lore.kernel.org/linux-cve-announce/202605… external
https://access.redhat.com/security/cve/CVE-2026-43110 self
https://bugzilla.redhat.com/show_bug.cgi?id=2467014 external
https://www.cve.org/CVERecord?id=CVE-2026-43110 external
https://nvd.nist.gov/vuln/detail/CVE-2026-43110 external
https://lore.kernel.org/linux-cve-announce/202605… external
https://access.redhat.com/security/cve/CVE-2026-43190 self
https://bugzilla.redhat.com/show_bug.cgi?id=2467064 external
https://www.cve.org/CVERecord?id=CVE-2026-43190 external
https://nvd.nist.gov/vuln/detail/CVE-2026-43190 external
https://lore.kernel.org/linux-cve-announce/202605… external
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        "text": "An update for kernel is now available for Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On and Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support.\n\nRed Hat Product Security has rated this update as having a security impact of Critical. 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.",
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        "text": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: nvme: avoid double free special payload (CVE-2024-41073)\n\n* kernel: sctp: fix a potential overflow in sctp_ifwdtsn_skip (CVE-2023-53372)\n\n* kernel: net: use dst_dev_rcu() in sk_setup_caps() (CVE-2025-40170)\n\n* kernel: ipv6: use RCU in ip6_xmit() (CVE-2025-40135)\n\n* kernel: ipv6: use RCU in ip6_output() (CVE-2025-40158)\n\n* kernel: nbd: defer config unlock in nbd_genl_connect (CVE-2025-68366)\n\n* kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id (CVE-2025-68724)\n\n* kernel: iommu: disable SVA when CONFIG_X86 is set (CVE-2025-71089)\n\n* kernel: macvlan: fix possible UAF in macvlan_forward_source() (CVE-2026-23001)\n\n* kernel: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() (CVE-2026-23216)\n\n* kernel: can: raw: fix ro-\u003euniq use-after-free in raw_rcv() (CVE-2026-31532)\n\n* kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685)\n\n* kernel: ip6_tunnel: clear skb2-\u003ecb[] in ip4ip6_err() (CVE-2026-43037)\n\n* kernel: ipv6: icmp: clear skb2-\u003ecb[] in ip6_err_gen_icmpv6_unreach() (CVE-2026-43038)\n\n* kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110)\n\n* kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190)\n\nFor 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.",
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        "text": "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.",
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          "text": "kernel: sctp: fix a potential overflow in sctp_ifwdtsn_skip",
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      "title": "kernel: sctp: fix a potential overflow in sctp_ifwdtsn_skip"
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    {
      "cve": "CVE-2024-41073",
      "cwe": {
        "id": "CWE-1341",
        "name": "Multiple Releases of Same Resource or Handle"
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      "discovery_date": "2024-07-29T00:00:00+00:00",
      "ids": [
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          "text": "2301637"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s NVMe component. This vulnerability is due to a double free error that occurs when a discard request needs to be retried and fails before a new special payload is added. A local attacker could exploit this memory corruption issue to cause a denial of service (DoS).",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: nvme: avoid double free special payload",
          "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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        {
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2024-41073",
          "url": "https://www.cve.org/CVERecord?id=CVE-2024-41073"
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          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2024-41073",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-41073"
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          "summary": "https://lore.kernel.org/linux-cve-announce/2024072909-CVE-2024-41073-1fb9@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2024072909-CVE-2024-41073-1fb9@gregkh/T"
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        {
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      "title": "kernel: nvme: avoid double free special payload"
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      "cve": "CVE-2025-40135",
      "cwe": {
        "id": "CWE-825",
        "name": "Expired Pointer Dereference"
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      "discovery_date": "2025-11-12T00:00:00+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2414521"
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      "notes": [
        {
          "category": "description",
          "text": "A use-after-free flaw was found in ip6_autoflowlabel in the Linux kernel\u0027s net/ipv6/ip6_output.c code. In this flaw an attacker can cause a denial of service (DoS) attack.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: ipv6: use RCU in ip6_xmit()",
          "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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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2025-40135"
        },
        {
          "category": "external",
          "summary": "RHBZ#2414521",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2414521"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-40135",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-40135"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-40135",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40135"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2025111255-CVE-2025-40135-67ca@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2025111255-CVE-2025-40135-67ca@gregkh/T"
        }
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      "release_date": "2025-11-12T00:00:00+00:00",
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          "date": "2026-06-12T19:56:20+00:00",
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            "baseScore": 7.0,
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            "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",
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      "title": "kernel: ipv6: use RCU in ip6_xmit()"
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      "cve": "CVE-2025-40158",
      "cwe": {
        "id": "CWE-825",
        "name": "Expired Pointer Dereference"
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          "text": "A use-after-free flaw was found in ip6_finish_output2 in  net/ipv6/ip6_output.c in ipv6 access. This flaw could allow an attacker to crash the system at device disconnect. This vulnerability could even lead to a kernel information leak problem.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: ipv6: use RCU in ip6_output()",
          "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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      "title": "kernel: ipv6: use RCU in ip6_output()"
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    {
      "cve": "CVE-2025-40170",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
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      "discovery_date": "2025-11-12T00:00:00+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2414506"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s networking subsystem. A local attacker could exploit this vulnerability to escalate privileges or cause a Denial of Service (DoS) through a kernel crash. By rapidly altering network routes while establishing socket connections, an attacker triggers a race condition where the kernel accesses device memory that has already been freed due to a lack of proper synchronization.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: net: use dst_dev_rcu() in sk_setup_caps()",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Several paths read dst-\u003edev without RCU. A concurrent dst/device teardown could cause a use-after-free\u2014fixed by switching to dst_dev_rcu() and wrapping sections in rcu_read_lock(), mitigating a local DoS/LPE risk.\nA local user floods route changes (device up/down, MTU/GSO tweaks, dst churn) while rapidly creating sockets, racing sk_setup_caps() to read dev after free that leads to kernel crash.",
          "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"
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2025-40170"
        },
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2414506"
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-40170",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-40170"
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          "category": "external",
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40170"
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          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2025111259-CVE-2025-40170-d39d@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2025111259-CVE-2025-40170-d39d@gregkh/T"
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          "date": "2026-06-12T19:56:20+00:00",
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            "attackComplexity": "HIGH",
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            "availabilityImpact": "HIGH",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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          "details": "Moderate"
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      "title": "kernel: net: use dst_dev_rcu() in sk_setup_caps()"
    },
    {
      "cve": "CVE-2025-68366",
      "cwe": {
        "id": "CWE-911",
        "name": "Improper Update of Reference Count"
      },
      "discovery_date": "2025-12-24T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2424881"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: defer config unlock in nbd_genl_connect\n\nThere is one use-after-free warning when running NBD_CMD_CONNECT and\nNBD_CLEAR_SOCK:\n\nnbd_genl_connect\n  nbd_alloc_and_init_config // config_refs=1\n  nbd_start_device // config_refs=2\n  set NBD_RT_HAS_CONFIG_REF\t\t\topen nbd // config_refs=3\n  recv_work done // config_refs=2\n\t\t\t\t\t\tNBD_CLEAR_SOCK // config_refs=1\n\t\t\t\t\t\tclose nbd // config_refs=0\n  refcount_inc -\u003e uaf\n\n------------[ cut here ]------------\nrefcount_t: addition on 0; use-after-free.\nWARNING: CPU: 24 PID: 1014 at lib/refcount.c:25 refcount_warn_saturate+0x12e/0x290\n nbd_genl_connect+0x16d0/0x1ab0\n genl_family_rcv_msg_doit+0x1f3/0x310\n genl_rcv_msg+0x44a/0x790\n\nThe issue can be easily reproduced by adding a small delay before\nrefcount_inc(\u0026nbd-\u003econfig_refs) in nbd_genl_connect():\n\n        mutex_unlock(\u0026nbd-\u003econfig_lock);\n        if (!ret) {\n                set_bit(NBD_RT_HAS_CONFIG_REF, \u0026config-\u003eruntime_flags);\n+               printk(\"before sleep\\n\");\n+               mdelay(5 * 1000);\n+               printk(\"after sleep\\n\");\n                refcount_inc(\u0026nbd-\u003econfig_refs);\n                nbd_connect_reply(info, nbd-\u003eindex);\n        }",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: nbd: defer config unlock in nbd_genl_connect",
          "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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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2025-68366"
        },
        {
          "category": "external",
          "summary": "RHBZ#2424881",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2424881"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-68366",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-68366"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-68366",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68366"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2025122459-CVE-2025-68366-b367@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2025122459-CVE-2025-68366-b367@gregkh/T"
        }
      ],
      "release_date": "2025-12-24T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-06-12T19:56:20+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.",
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      "title": "kernel: nbd: defer config unlock in nbd_genl_connect"
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    {
      "cve": "CVE-2025-68724",
      "cwe": {
        "id": "CWE-190",
        "name": "Integer Overflow or Wraparound"
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      "discovery_date": "2025-12-24T00:00:00+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2424886"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s asymmetric keys subsystem. An integer overflow in the asymmetric_key_generate_id function can lead to memory corruption when calculating buffer sizes for asymmetric key identifiers. A local attacker with privileges to load cryptographic certificates into the kernel keyring could exploit this flaw by providing a crafted X.509 certificate with oversized fields. This could result in a Denial of Service (DoS) through a system crash or unauthorized memory disclosure.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat has rated this vulnerability as Moderate severity because exploitation requires local access and the ability to load a malformed X.509 certificate through kernel keyring interfaces. On typical Red Hat Enterprise Linux deployments, asymmetric key parsing is primarily utilized during system boot, module loading, or administrative cryptographic operations. A local attacker with appropriate privileges could supply a crafted certificate to cause memory corruption, potentially triggering a kernel crash or unauthorized memory disclosure.",
          "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"
        }
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2025-68724"
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        {
          "category": "external",
          "summary": "RHBZ#2424886",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2424886"
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-68724",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-68724"
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          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-68724",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68724"
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        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2025122404-CVE-2025-68724-4d3c@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2025122404-CVE-2025-68724-4d3c@gregkh/T"
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          "date": "2026-06-12T19:56:20+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.",
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      "title": "kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id"
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    {
      "cve": "CVE-2025-71089",
      "cwe": {
        "id": "CWE-820",
        "name": "Missing Synchronization"
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      "ids": [
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          "text": "2429104"
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        {
          "category": "description",
          "text": "A security vulnerability was found in the Linux kernel\u0027s IOMMU Shared Virtual Addressing (SVA) implementation on x86 architecture. When SVA is enabled, the IOMMU caches kernel page table entries. Since the kernel lacks a mechanism to notify the IOMMU when kernel page table pages are freed and reallocated, the IOMMU can retain stale entries pointing to reused memory. This can lead to use-after-free or write-after-free conditions, potentially enabling arbitrary physical memory DMA access or privilege escalation.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: iommu: disable SVA when CONFIG_X86 is set",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is a significant security vulnerability affecting x86 systems with IOMMU SVA support enabled. While SVA contexts are unprivileged and cannot directly access kernel mappings, the IOMMU still walks and caches intermediate kernel page table entries. An attacker could potentially exploit the stale cache entries to gain arbitrary DMA access or escalate privileges. The fix disables SVA on x86 until proper cache invalidation mechanisms are implemented.",
          "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"
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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2025-71089"
        },
        {
          "category": "external",
          "summary": "RHBZ#2429104",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2429104"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-71089",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-71089"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-71089",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-71089"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026011341-CVE-2025-71089-a642@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026011341-CVE-2025-71089-a642@gregkh/T"
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      "release_date": "2026-01-13T00:00:00+00:00",
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          "category": "vendor_fix",
          "date": "2026-06-12T19:56:20+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.",
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      "title": "kernel: iommu: disable SVA when CONFIG_X86 is set"
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    {
      "cve": "CVE-2026-23001",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
      "discovery_date": "2026-01-25T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2432664"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s macvlan driver. This vulnerability occurs when a network source entry is deleted while network traffic is actively being forwarded without proper synchronization, resulting in a use-after-free condition. A local attacker with network administration privileges can exploit this race condition to crash the system, causing a Denial of Service (DoS), or potentially achieve privilege escalation.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: macvlan: fix possible UAF in macvlan_forward_source()",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "A use-after-free can occur in macvlan source-mode forwarding when a source hash entry is deleted while the transmit/forwarding path still dereferences entry.vlan without proper RCU protection. A local attacker who can configure macvlan networking can race deletion with packet processing to crash the kernel and potentially achieve memory corruption.\nExploitation typically requires the CAP_NET_ADMIN capability (often within a user 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"
        }
      ],
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-23001"
        },
        {
          "category": "external",
          "summary": "RHBZ#2432664",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2432664"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-23001",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-23001"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-23001",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23001"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026012534-CVE-2026-23001-7ab0@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026012534-CVE-2026-23001-7ab0@gregkh/T"
        }
      ],
      "release_date": "2026-01-25T00:00:00+00:00",
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          "category": "vendor_fix",
          "date": "2026-06-12T19:56:20+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.",
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        {
          "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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    {
      "cve": "CVE-2026-23216",
      "cwe": {
        "id": "CWE-413",
        "name": "Improper Resource Locking"
      },
      "discovery_date": "2026-02-18T00:00:00+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2440630"
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      "notes": [
        {
          "category": "description",
          "text": "A use-after-free flaw was found in the Linux kernel\u0027s iSCSI target subsystem. In the iscsit_dec_conn_usage_count() function, complete() is called while still holding the conn-\u003econn_usage_lock spinlock. The waiting thread (such as iscsit_close_connection()) may wake up immediately and free the iscsit_conn structure before the current thread executes spin_unlock_bh(), resulting in a use-after-free when attempting to release the lock on already-freed memory.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count()",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability requires the iSCSI target subsystem to be configured and in use, which limits the attack surface to systems actively serving as iSCSI targets. The race condition is timing-dependent and requires specific connection teardown sequences to trigger. Successful exploitation could lead to kernel crash or potentially memory corruption.",
          "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"
        }
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23216"
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          "url": "https://lore.kernel.org/linux-cve-announce/2026021800-CVE-2026-23216-6c63@gregkh/T"
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          "details": "To mitigate this issue, prevent the iscsi_target_mod module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on how to blacklist kernel modules.",
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          "category": "impact",
          "details": "Moderate"
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      ],
      "title": "kernel: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count()"
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    {
      "cve": "CVE-2026-31532",
      "cwe": {
        "id": "CWE-366",
        "name": "Race Condition within a Thread"
      },
      "discovery_date": "2026-04-23T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2461107"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s Controller Area Network (CAN) raw socket implementation. A use-after-free vulnerability can occur due to a timing window during the unregistration of CAN receive filters, allowing a freed memory region to be accessed. This could lead to system instability or a denial of service (DoS).",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: can: raw: fix ro-\u003euniq use-after-free in raw_rcv()",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "A use-after-free flaw in the Linux kernel CAN raw socket implementation can occur when raw_release() frees the per-CPU ro-\u003euniq storage before RCU-deferred receive callbacks have fully drained. A local attacker able to create raw CAN sockets and trigger CAN receive activity could race socket teardown with raw_rcv() and cause a kernel crash. The likely impact is denial of service, while privilege escalation would require additional, unproven control over per-CPU memory reuse.\nThe issue appears more consistent with an RCU lifetime/race-condition bug leading primarily to denial of service, as exploitation depends on a narrow teardown race involving a percpu object rather than a generic reclaimable slab object, with no demonstrated privilege-escalation path or obvious controlled overwrite primitive in the relatively niche CAN raw socket subsystem.",
          "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"
        }
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-31532"
        },
        {
          "category": "external",
          "summary": "RHBZ#2461107",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461107"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-31532",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-31532"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-31532",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31532"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026042349-CVE-2026-31532-a820@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026042349-CVE-2026-31532-a820@gregkh/T"
        }
      ],
      "release_date": "2026-04-23T00:00:00+00:00",
      "remediations": [
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          "category": "vendor_fix",
          "date": "2026-06-12T19:56:20+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.",
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          "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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    {
      "cve": "CVE-2026-31685",
      "cwe": {
        "id": "CWE-1287",
        "name": "Improper Validation of Specified Type of Input"
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      "discovery_date": "2026-04-25T00:00:00+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2461759"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s netfilter component. This vulnerability occurs because the `eui64_mt6()` function, which processes IPv6 packets, does not properly validate the MAC header for all packets. Specifically, packets with a zero fragment offset could bypass an existing guard, allowing the system to attempt to access an invalid MAC header. A remote attacker could exploit this by sending specially crafted IPv6 packets, potentially causing a system crash and leading to a Denial of Service (DoS).",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability is rated as Moderate impact for Red Hat Enterprise Linux because triggering it requires a non-standard network filtering configuration that explicitly enables IPv6 EUI-64 matching. In default installations, the affected netfilter extension is not active or loaded, significantly restricting the attack surface. While an attacker on the local network could theoretically cause a kernel crash or system denial of service by sending malformed IPv6 traffic, the issue only presents a risk on systems actively inspecting source MAC addresses through this specific match target.",
          "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"
        }
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        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets"
    },
    {
      "cve": "CVE-2026-43037",
      "cwe": {
        "id": "CWE-843",
        "name": "Access of Resource Using Incompatible Type"
      },
      "discovery_date": "2026-05-01T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2464351"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s IPv6 tunnel implementation. A remote attacker could exploit this flaw by sending malicious ICMPv6 error messages to cause a stack-based buffer overflow in the kernel\u0027s IPv4-over-IPv6 tunnel error handling code. This could result in a kernel crash (denial of service) or potentially allow arbitrary code execution with kernel privileges.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: ip6_tunnel: clear skb2-\u003ecb[] in ip4ip6_err()",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This Critical flaw in the Linux kernel\u0027s IPv6 tunneling error handling can lead to a stack buffer overflow. An unauthenticated remote attacker could exploit this by sending specially crafted network packets, potentially resulting in a denial of service or information disclosure on affected Red Hat Enterprise Linux systems.",
          "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"
        }
      ],
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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-43037"
        },
        {
          "category": "external",
          "summary": "RHBZ#2464351",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464351"
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        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-43037",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-43037"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-43037",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43037"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026050102-CVE-2026-43037-0346@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026050102-CVE-2026-43037-0346@gregkh/T"
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          "category": "vendor_fix",
          "date": "2026-06-12T19:56:20+00:00",
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            "integrityImpact": "HIGH",
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          "details": "Critical"
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      "title": "kernel: ip6_tunnel: clear skb2-\u003ecb[] in ip4ip6_err()"
    },
    {
      "cve": "CVE-2026-43038",
      "cwe": {
        "id": "CWE-843",
        "name": "Access of Resource Using Incompatible Type"
      },
      "discovery_date": "2026-05-01T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2464397"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s IPv6 ICMP error generation. A remote attacker could send a specially crafted IPv4 ICMP error packet with a Common Internet Protocol Security Option (CIPSO) IP option. This could lead to incorrect handling of packet control block data when generating an IPv6 ICMP error, potentially causing an out-of-bounds memory access. This memory corruption could result in information disclosure or a denial of service.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: ipv6: icmp: clear skb2-\u003ecb[] in ip6_err_gen_icmpv6_unreach()",
          "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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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-43038"
        },
        {
          "category": "external",
          "summary": "RHBZ#2464397",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464397"
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-43038",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-43038"
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43038"
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          "summary": "https://lore.kernel.org/linux-cve-announce/2026050103-CVE-2026-43038-b591@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026050103-CVE-2026-43038-b591@gregkh/T"
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        "name": "Improper Validation of Specified Index, Position, or Offset in Input"
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2467014"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s brcmfmac Wi-Fi driver. This vulnerability occurs because the driver fails to properly validate bsscfg indices in interface (IF) events. An attacker could exploit this by sending a specially crafted IF event with an invalid bsscfg index, which could lead to an out-of-bounds write or read, potentially causing a system crash and resulting in a denial of service (DoS).",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: wifi: brcmfmac: validate bsscfg indices in IF events",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "brcmfmac IF event handling validates the firmware provided ifidx but still uses the raw bsscfgidx value as an index into the driver iflist array. A malformed firmware IF event with an out of range bsscfgidx can cause an out of bounds pointer read and may lead to an invalid pointer dereference or broader memory corruption depending on how the resulting ifp is used. For the CVSS the PR:N is used in the paranoid score because a practical attacker model may involve adjacent Wi-Fi influence over FullMAC firmware events rather than a local privileged user on the host. The issue is not reachable over a normal routed IP network. It is adjacent network or device firmware mediated. Impact is at least denial of service through a kernel crash or Wi-Fi driver failure. In the paranoid case, the unchecked firmware controlled array index potentially could lead to possible confidentiality and integrity impact (but primarily only Availability impact).",
          "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"
        }
      ],
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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-43110"
        },
        {
          "category": "external",
          "summary": "RHBZ#2467014",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467014"
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-43110",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-43110"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-43110",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43110"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026050624-CVE-2026-43110-7309@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026050624-CVE-2026-43110-7309@gregkh/T"
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      "release_date": "2026-05-06T00:00:00+00:00",
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          "category": "vendor_fix",
          "date": "2026-06-12T19:56:20+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.",
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      "title": "kernel: wifi: brcmfmac: validate bsscfg indices in IF events"
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    {
      "cve": "CVE-2026-43190",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
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      "discovery_date": "2026-05-06T00:00:00+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2467064"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel, specifically within the netfilter: xt_tcpmss module. A remote attacker could exploit this vulnerability by sending a specially crafted TCP packet. The TCP option parser does not properly validate the remaining option length, which results in an out-of-bounds read. This allows an attacker to access memory beyond the intended buffer, potentially leading to information disclosure.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: netfilter: xt_tcpmss: check remaining length before reading optlen",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "xt_tcpmss can read one byte past the TCP option boundary when the last option byte is not EOL or NOP. The parser may evaluate op i plus 1 while i is already the final byte of the option area, so a crafted TCP packet can trigger an out of bounds read in the netfilter match path. If the attacker can send packets through a ruleset that uses the tcpmss match, then it can trigger this bug. The issue is network reachable only on systems with an applicable xt_tcpmss or iptables rule, and it is not a generic TCP stack exposure. Impact is primarily limited confidentiality risk from a one byte out of bounds read and possible low availability impact.",
          "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"
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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-43190"
        },
        {
          "category": "external",
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-43190",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-43190"
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          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-43190",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43190"
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          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026050642-CVE-2026-43190-f1c9@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026050642-CVE-2026-43190-f1c9@gregkh/T"
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          "category": "vendor_fix",
          "date": "2026-06-12T19:56:20+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.",
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
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      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "kernel: netfilter: xt_tcpmss: check remaining length before reading optlen"
    }
  ]
}



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