RHSA-2026:62641 - Security Advisory

Topic

An update for multiple packages is now available for Red Hat Enterprise Linux 9.6 Extended Update Support.

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-5.14.0-570.17.1.el9_6.

Security Fix(es):

• kernel: Kernel: Privilege escalation or denial of service in nf_tables via inverted element activity check (CVE-2026-23111)
• kernel: netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry (CVE-2026-43114)
• kernel: fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath (CVE-2026-43112)
• kernel: Linux kernel: Use-After-Free in net/gro due to improper handling of zerocopy skbs (CVE-2026-46323)
• kernel: net/sched: act_api: use RCU with deferred freeing for action lifecycle (CVE-2026-53264)

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 - Extended Update Support 9.6 x86_64
• Red Hat Enterprise Linux Server - AUS 9.6 x86_64
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.6 ppc64le
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.6 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.6 x86_64
• Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.6 ppc64le

Fixes

• BZ - 2439687 - CVE-2026-23111 kernel: Kernel: Privilege escalation or denial of service in nf_tables via inverted element activity check
• BZ - 2466994 - CVE-2026-43114 kernel: netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry
• BZ - 2467015 - CVE-2026-43112 kernel: fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath
• BZ - 2479832 - CVE-2026-46323 kernel: Linux kernel: Use-After-Free in net/gro due to improper handling of zerocopy skbs
• BZ - 2492851 - CVE-2026-53264 kernel: net/sched: act_api: use RCU with deferred freeing for action lifecycle

CVEs

• CVE-2026-23111
• CVE-2026-43112
• CVE-2026-43114
• CVE-2026-46323
• CVE-2026-53264

References

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