RHSA-2026:55618 - Security Advisory

Topic

An update for kpatch-patch-6_12_0-211_16_1 is now available for Red Hat Enterprise Linux 10.

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.

Description

This is a kernel live patch module which can be loaded by the kpatch command line utility to modify the code of a running kernel. This patch module is targeted for kernel-6.12.0-211.16.1.el10_2.

Security Fix(es):

• kernel: rxrpc: Fix RxGK token loading to check bounds (CVE-2026-31641)
• kernel: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() (CVE-2026-43038)
• kernel: netfilter: flowtable: strictly check for maximum number of actions (CVE-2026-43329)
• kernel: netfilter: nft_inner: Fix IPv6 inner_thoff desync (CVE-2026-46244)
• kernel: net: sched: UAF via missing handler for TC_ACT_CONSUMED in tcf_qevent_handle (CVE-2026-64530)

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.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 10 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.2 x86_64
• Red Hat Enterprise Linux for Power, little endian 10 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.2 ppc64le
• Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.2 ppc64le
• Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.2 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 10.2 x86_64
• Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 10.2 ppc64le

Fixes

• BZ - 2461548 - CVE-2026-31641 kernel: rxrpc: Fix RxGK token loading to check bounds
• BZ - 2464397 - CVE-2026-43038 kernel: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach()
• BZ - 2468124 - CVE-2026-43329 kernel: netfilter: flowtable: strictly check for maximum number of actions
• BZ - 2484451 - CVE-2026-46244 kernel: netfilter: nft_inner: Fix IPv6 inner_thoff desync
• BZ - 2504052 - CVE-2026-64530 kernel: net: sched: UAF via missing handler for TC_ACT_CONSUMED in tcf_qevent_handle

CVEs

• CVE-2026-31641
• CVE-2026-43038
• CVE-2026-43329
• CVE-2026-46244
• CVE-2026-64530

References

• https://access.redhat.com/security/updates/classification/#important