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RHSA-2026:68532

Vulnerability from csaf_redhat - Published: 2026-09-17 07:12 - Updated: 2026-09-17 15:02
Summary
Red Hat Security Advisory: kernel-rt security update
Severity
Important
Notes
Topic: An update for kernel-rt is now available for Red Hat Enterprise Linux 8. 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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): * kernel: ipvlan: Make the addrs_lock be per port (CVE-2026-23103) * kernel: xfrm: hold dev ref until after transport_finish NF_HOOK (CVE-2026-31663) * kernel: netfilter: nf_conntrack_h323: fix OOB read in decode_choice() (CVE-2026-43233) * kernel: ipv6: prevent possible UaF in addrconf_permanent_addr() (CVE-2026-43339) * kernel: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP (CVE-2026-46266) * kernel: flow_dissector: do not dissect PPPoE PFC frames (CVE-2026-46306) * kernel: netfilter: xt_policy: fix strict mode inbound policy matching (CVE-2026-52920) * kernel: ppp: require CAP_NET_ADMIN in target netns for unattached ioctls (CVE-2026-53075) * kernel: ipv6: sit: reload inner IPv6 header after GSO offloads (CVE-2026-53228) * kernel: IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN (CVE-2026-53176) * kernel: netfilter: require Ethernet MAC header before using eth_hdr() (CVE-2026-53131) * kernel: netfilter: conntrack_irc: fix possible out-of-bounds read (CVE-2026-53268) * kernel: xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx() (CVE-2026-53239) * kernel: ALSA: timer: Fix UAF at snd_timer_user_params() (CVE-2026-53192) * kernel: net: guard timestamp cmsgs to real error queue skbs (CVE-2026-53223) * kernel: ipv6: mcast: Fix use-after-free when processing MLD queries (CVE-2026-53275) * kernel: ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table() (CVE-2026-64002) * 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: Linux kernel SLIP: Out-of-bounds write due to race condition during MTU change (CVE-2026-68143) * kernel: xfrm: fix stale skb->prev after async crypto steals a GSO segment (CVE-2026-68426) * kernel: net: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post() (CVE-2026-72298) 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-2026-23103

A race condition vulnerability was found in the Linux kernel's ipvlan driver. The per-device addrs_lock was incorrectly used instead of a per-port lock, and some code paths (ipvlan_open/ipvlan_close) failed to acquire the lock entirely. For IPv6 address changes that don't require RTNL lock, concurrent address additions could cause false-negative results from ipvlan_addr_busy() or race conditions when adding addresses to the hash table.

4.7 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-413 - Improper Resource Locking
Affected products
Product Identifier Version Remediation
Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-553.164.1.rt7.505.el8_10.src —
Vendor Fix fix
Workaround
Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-core-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-core-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-debuginfo-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-devel-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-kvm-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-modules-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-modules-extra-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debuginfo-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debuginfo-common-x86_64-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-devel-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-kvm-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-modules-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-modules-extra-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-553.164.1.rt7.505.el8_10.src —
Vendor Fix fix
Workaround
Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-core-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-debug-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-debug-core-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-debug-debuginfo-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-debug-devel-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-debug-modules-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-debug-modules-extra-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-debuginfo-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-debuginfo-common-x86_64-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-devel-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-modules-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-modules-extra-0:4.18.0-553.164.1.rt7.505.el8_10.x86_64 —
Vendor Fix fix
Workaround
Threats
Impact Moderate
CVE-2026-31663

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)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-826 - Premature Release of Resource During Expected Lifetime
Affected products
Fixed 30 products, the same list as for CVE-2026-23103
Threats
Impact Moderate
CVE-2026-43233

A flaw was found in the Linux kernel's `nf_conntrack_h323` helper. A remote attacker could exploit this by sending a specially crafted Q.931 SETUP message to port 1720 through a firewall with the `nf_conntrack_h323` helper active. This memory corruption vulnerability leads to an out-of-bounds read, which can result in a heap-buffer-overflow.

7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-131 - Incorrect Calculation of Buffer Size
Affected products
Fixed 30 products, the same list as for CVE-2026-23103
Threats
Impact Moderate
CVE-2026-43339

A flaw was found in the Linux kernel's IPv6 networking subsystem. Specifically, a Use-after-Free (UaF) vulnerability exists within the `addrconf_permanent_addr()` function. This issue arises when the system attempts to access an IPv6 address after it has been freed, which could allow an attacker to cause a denial of service or potentially execute arbitrary code.

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 30 products, the same list as for CVE-2026-23103
Threats
Impact Moderate
CVE-2026-46266

A flaw was found in the Linux kernel's handling of RAW sockets using IPPROTO_RAW. A remote attacker could send a specially crafted ICMP (Internet Control Message Protocol) packet. This malicious packet could set the protocol field to 255, causing it to be processed by a RAW socket configured for IPPROTO_RAW. This leads to unintended FNHE (Flow N-tuple Hash Entry) cache changes, which could result in unexpected network behavior.

7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-1287 - Improper Validation of Specified Type of Input
Affected products
Fixed 30 products, the same list as for CVE-2026-23103
Threats
Impact Moderate
CVE-2026-46306

A flaw was found in the Linux kernel's flow dissector. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by sending a specially crafted Point-to-Point Protocol over Ethernet (PPPoE) Protocol Field Compression (PFC) frame to an affected system. The incorrect processing of these compressed frames leads to a memory misalignment, which can result in a kernel crash on certain architectures.

7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')
Affected products
Fixed 30 products, the same list as for CVE-2026-23103
Threats
Impact Moderate
CVE-2026-52920

A flaw was found in the Linux kernel's netfilter component, which is responsible for network packet filtering. This vulnerability, located in the `xt_policy` module, involves an error in how strict inbound network policies are matched. This could allow an attacker to bypass established security rules, potentially leading to unauthorized network access or unintended exposure of services. The flaw could compromise the effectiveness of network traffic control.

7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-551 - Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
Affected products
Fixed 30 products, the same list as for CVE-2026-23103
Threats
Impact Moderate
CVE-2026-53075

A flaw was found in the Linux kernel's Point-to-Point Protocol (PPP) subsystem. A local unprivileged user can exploit this vulnerability by creating a new user namespace and bypassing authorization checks for unattached administrative input/output controls (ioctls). This allows the user to perform unauthorized administrative operations on an inherited network namespace, potentially leading to privilege escalation.

7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-266 - Incorrect Privilege Assignment
Affected products
Fixed 30 products, the same list as for CVE-2026-23103
Threats
Impact Moderate
CVE-2026-53131

A flaw was found in the Linux kernel's netfilter component. Certain netfilter modules, including `ip6t_eui64` and `xt_mac`, accessed Ethernet MAC header data without first verifying that an Ethernet device was associated with the network packet or that the MAC header was present and of sufficient length. This oversight could allow a local or remote attacker to trigger an out-of-bounds read, potentially leading to a system crash and a Denial of Service (DoS).

7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-125 - Out-of-bounds Read
Affected products
Fixed 30 products, the same list as for CVE-2026-23103
Threats
Impact Moderate
CVE-2026-53176

A flaw was found in the Linux kernel's Internet Small Computer System Interface (iSCSI) Extensions for Remote Direct Memory Access (RDMA) (iSER) module. A remote attacker can send a specially crafted login request with a payload shorter than expected, leading to an integer underflow. This underflow causes a negative length to be used in a memory copy operation, resulting in an out-of-bounds write that crashes the system. This vulnerability allows an unauthenticated remote attacker to cause a Denial of Service (DoS).

6.5 (Medium)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-839 - Numeric Range Comparison Without Minimum Check
Affected products
Fixed 30 products, the same list as for CVE-2026-23103
Threats
Impact Moderate
CVE-2026-53192

A flaw was found in the Linux kernel's Advanced Linux Sound Architecture (ALSA) timer component. A race condition can occur during the release of a timer object, specifically when the SNDRV_TIMER_IOCTL_PARAMS ioctl is called concurrently. This can lead to a use-after-free vulnerability, potentially allowing a local attacker to achieve arbitrary code execution or cause a denial of service.

7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-364 - Signal Handler Race Condition
Affected products
Fixed 30 products, the same list as for CVE-2026-23103
Threats
Impact Moderate
CVE-2026-53223

A flaw was found in the Linux kernel's networking component. This vulnerability allows a remote attacker to potentially access sensitive information or cause system instability. By sending specially crafted network packets, an attacker can exploit an issue in how the kernel handles timestamping for certain network traffic. This can lead to the disclosure of memory contents or trigger memory corruption.

7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-125 - Out-of-bounds Read
Affected products
Fixed 30 products, the same list as for CVE-2026-23103
Threats
Impact Moderate
CVE-2026-53228

A flaw was found in the Linux kernel's Simple Internet Transition (SIT) tunnel driver for IPv6. When processing network traffic with Generic Segmentation Offload (GSO) enabled, the driver may use a stale pointer to the inner IPv6 header after the socket buffer (skb) head has been reallocated. This can lead to reading from freed memory, potentially allowing an attacker to cause a denial of service or gain access to sensitive information.

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 30 products, the same list as for CVE-2026-23103
Threats
Impact Moderate
CVE-2026-53239

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)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-364 - Signal Handler Race Condition
Affected products
Fixed 30 products, the same list as for CVE-2026-23103
Threats
Impact Moderate
CVE-2026-53268

A flaw was found in the Linux kernel's netfilter conntrack_irc module. This vulnerability allows for a possible out-of-bounds read. When parsing network traffic, if a command string is matched but subsequent parsing fails, the system does not properly exit, leading to the flaw. This could potentially allow an attacker to cause a denial of service or disclose sensitive information.

7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-125 - Out-of-bounds Read
Affected products
Fixed 30 products, the same list as for CVE-2026-23103
Threats
Impact Moderate
CVE-2026-53275

A flaw was found in the Linux kernel's IPv6 multicast (mcast) component. When processing Multicast Listener Discovery (MLD) queries, a pointer to the multicast group address is not correctly reloaded after certain packet manipulations. This can lead to a use-after-free vulnerability, potentially allowing an attacker to cause a denial of service or achieve arbitrary code execution.

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 30 products, the same list as for CVE-2026-23103
Threats
Impact Moderate
CVE-2026-63917

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)
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 30 products, the same list as for CVE-2026-23103
Threats
Impact Important
CVE-2026-63919

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)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-911 - Improper Update of Reference Count
Affected products
Fixed 30 products, the same list as for CVE-2026-23103
Threats
Impact Moderate
CVE-2026-63921

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)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-653 - Improper Isolation or Compartmentalization
Affected products
Fixed 30 products, the same list as for CVE-2026-23103
Threats
Impact Important
CVE-2026-64002

A flaw was found in the Linux kernel's IPv4 networking component. The `ipv4_sysctl_exit_net()` function prematurely frees the `net->ipv4.sysctl_local_reserved_ports` memory. This can lead to a use-after-free vulnerability, where other threads might attempt to access deallocated memory. Such an issue can result in system instability or a denial of service.

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 30 products, the same list as for CVE-2026-23103
Threats
Impact Important
CVE-2026-68143

A flaw was found in the Linux kernel's SLIP (Serial Line Internet Protocol) network component. A race condition exists during an MTU (Maximum Transmission Unit) change when the system reallocates receive buffers. This can allow a remote attacker to trigger an out-of-bounds write or write to a freed memory region, potentially leading to a denial of service or arbitrary code execution.

7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-787 - Out-of-bounds Write
Affected products
Fixed 30 products, the same list as for CVE-2026-23103
Threats
Impact Important
CVE-2026-68426

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)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
CWE-825 - Expired Pointer Dereference
Affected products
Fixed 30 products, the same list as for CVE-2026-23103
Threats
Impact Important
CVE-2026-72298

A flaw was found in the Linux kernel's `qrtr` network component. On 32-bit systems, a 32-bit integer overflow can occur in the `qrtr_endpoint_post()` function when processing an incoming packet. This overflow can bypass a size validation check, leading to an out-of-bounds write and causing the kernel to crash. This vulnerability could allow a local attacker to cause a Denial of Service (DoS).

7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-787 - Out-of-bounds Write
Affected products
Fixed 30 products, the same list as for CVE-2026-23103
Threats
Impact Important
References
URL Category
https://access.redhat.com/errata/RHSA-2026:68532 self
https://access.redhat.com/security/updates/classi… external
https://bugzilla.redhat.com/show_bug.cgi?id=2436771 external
https://bugzilla.redhat.com/show_bug.cgi?id=2461462 external
https://bugzilla.redhat.com/show_bug.cgi?id=2467135 external
https://bugzilla.redhat.com/show_bug.cgi?id=2468102 external
https://bugzilla.redhat.com/show_bug.cgi?id=2484456 external
https://bugzilla.redhat.com/show_bug.cgi?id=2486463 external
https://bugzilla.redhat.com/show_bug.cgi?id=2492112 external
https://bugzilla.redhat.com/show_bug.cgi?id=2492295 external
https://bugzilla.redhat.com/show_bug.cgi?id=2492733 external
https://bugzilla.redhat.com/show_bug.cgi?id=2492741 external
https://bugzilla.redhat.com/show_bug.cgi?id=2492747 external
https://bugzilla.redhat.com/show_bug.cgi?id=2492770 external
https://bugzilla.redhat.com/show_bug.cgi?id=2492779 external
https://bugzilla.redhat.com/show_bug.cgi?id=2492792 external
https://bugzilla.redhat.com/show_bug.cgi?id=2492811 external
https://bugzilla.redhat.com/show_bug.cgi?id=2492841 external
https://bugzilla.redhat.com/show_bug.cgi?id=2502363 external
https://bugzilla.redhat.com/show_bug.cgi?id=2502368 external
https://bugzilla.redhat.com/show_bug.cgi?id=2502412 external
https://bugzilla.redhat.com/show_bug.cgi?id=2502434 external
https://bugzilla.redhat.com/show_bug.cgi?id=2513218 external
https://bugzilla.redhat.com/show_bug.cgi?id=2513477 external
https://bugzilla.redhat.com/show_bug.cgi?id=2516599 external
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https://nvd.nist.gov/vuln/detail/CVE-2026-72298 external
https://lore.kernel.org/linux-cve-announce/202608… external
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        "text": "An update for kernel-rt is now available for Red Hat Enterprise Linux 8.\n\nRed 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.",
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        "text": "The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.\n\nSecurity Fix(es):\n\n* kernel: ipvlan: Make the addrs_lock be per port (CVE-2026-23103)\n\n* kernel: xfrm: hold dev ref until after transport_finish NF_HOOK (CVE-2026-31663)\n\n* kernel: netfilter: nf_conntrack_h323: fix OOB read in decode_choice() (CVE-2026-43233)\n\n* kernel: ipv6: prevent possible UaF in addrconf_permanent_addr() (CVE-2026-43339)\n\n* kernel: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP (CVE-2026-46266)\n\n* kernel: flow_dissector: do not dissect PPPoE PFC frames (CVE-2026-46306)\n\n* kernel: netfilter: xt_policy: fix strict mode inbound policy matching (CVE-2026-52920)\n\n* kernel: ppp: require CAP_NET_ADMIN in target netns for unattached ioctls (CVE-2026-53075)\n\n* kernel: ipv6: sit: reload inner IPv6 header after GSO offloads (CVE-2026-53228)\n\n* kernel: IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN (CVE-2026-53176)\n\n* kernel: netfilter: require Ethernet MAC header before using eth_hdr() (CVE-2026-53131)\n\n* kernel: netfilter: conntrack_irc: fix possible out-of-bounds read (CVE-2026-53268)\n\n* kernel: xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx() (CVE-2026-53239)\n\n* kernel: ALSA: timer: Fix UAF at snd_timer_user_params() (CVE-2026-53192)\n\n* kernel: net: guard timestamp cmsgs to real error queue skbs (CVE-2026-53223)\n\n* kernel: ipv6: mcast: Fix use-after-free when processing MLD queries (CVE-2026-53275)\n\n* kernel: ipv4: free net-\u003eipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table() (CVE-2026-64002)\n\n* kernel: ip6: vti: Use ip6_tnl.net in vti6_siocdevprivate() (CVE-2026-63921)\n\n* kernel: xfrm: input: hold netns during deferred transport reinjection (CVE-2026-63919)\n\n* kernel: ip6: vti: Use ip6_tnl.net in vti6_changelink() (CVE-2026-63917)\n\n* kernel: Linux kernel SLIP: Out-of-bounds write due to race condition during MTU change (CVE-2026-68143)\n\n* kernel: xfrm: fix stale skb-\u003eprev after async crypto steals a GSO segment (CVE-2026-68426)\n\n* kernel: net: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post() (CVE-2026-72298)\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": "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.",
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          "title": "Vulnerability description"
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          "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.",
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        {
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          "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.",
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-72298"
        },
        {
          "category": "external",
          "summary": "RHBZ#2516599",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516599"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-72298",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-72298"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-72298",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72298"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026081502-CVE-2026-72298-9cab@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026081502-CVE-2026-72298-9cab@gregkh/T"
        }
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      "release_date": "2026-08-15T00:00:00+00:00",
      "remediations": [
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          "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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      "title": "kernel: net: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post()"
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  ]
}



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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.


Detection rules are retrieved from Rulezet.


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.