Issued:
2026-02-04
Updated:
2026-02-04

RHSA-2026:1886 - Important: kernel security update

Synopsis

Important: kernel security update

Type/Severity

Security Advisory Important

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.

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

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

  • kernel: mac80211: fix potential double free on mesh join (CVE-2022-49290)

  • kernel: cifs: fix oops during encryption (CVE-2022-50341)

  • kernel: i40e: fix idx validation in config queues msg (CVE-2025-39971)

  • kernel: ASoC: Intel: bytcr_rt5640: Fix invalid quirk input mapping (CVE-2025-40154)

  • kernel: Linux kernel: vsock vulnerability may lead to memory corruption (CVE-2025-40248)

  • kernel: Linux kernel Bluetooth L2CAP: Kernel crash due to use-after-free via race condition (CVE-2023-53751)

  • kernel: drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE (CVE-2025-40277)

  • kernel: net: atlantic: fix fragment overflow handling in RX path (CVE-2025-68301)

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

The system must be rebooted for this update to take effect.

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension8.4x86_64
Red Hat Enterprise Linux Server - AUS8.4x86_64

Updated Packages

  • kernel-debug-core-4.18.0-305.184.1.el8_4.x86_64.rpm
  • kernel-core-4.18.0-305.184.1.el8_4.x86_64.rpm
  • kernel-debug-devel-4.18.0-305.184.1.el8_4.x86_64.rpm
  • kernel-debug-modules-4.18.0-305.184.1.el8_4.x86_64.rpm
  • kernel-debug-debuginfo-4.18.0-305.184.1.el8_4.x86_64.rpm
  • kernel-debug-4.18.0-305.184.1.el8_4.x86_64.rpm
  • python3-perf-debuginfo-4.18.0-305.184.1.el8_4.x86_64.rpm
  • kernel-headers-4.18.0-305.184.1.el8_4.x86_64.rpm
  • kernel-modules-4.18.0-305.184.1.el8_4.x86_64.rpm
  • kernel-tools-4.18.0-305.184.1.el8_4.x86_64.rpm
  • bpftool-debuginfo-4.18.0-305.184.1.el8_4.x86_64.rpm
  • perf-4.18.0-305.184.1.el8_4.x86_64.rpm
  • kernel-doc-4.18.0-305.184.1.el8_4.noarch.rpm
  • kernel-debug-modules-extra-4.18.0-305.184.1.el8_4.x86_64.rpm
  • bpftool-4.18.0-305.184.1.el8_4.x86_64.rpm
  • kernel-debuginfo-common-x86_64-4.18.0-305.184.1.el8_4.x86_64.rpm
  • kernel-debuginfo-4.18.0-305.184.1.el8_4.x86_64.rpm
  • kernel-modules-extra-4.18.0-305.184.1.el8_4.x86_64.rpm
  • kernel-devel-4.18.0-305.184.1.el8_4.x86_64.rpm
  • kernel-tools-libs-4.18.0-305.184.1.el8_4.x86_64.rpm
  • perf-debuginfo-4.18.0-305.184.1.el8_4.x86_64.rpm
  • python3-perf-4.18.0-305.184.1.el8_4.x86_64.rpm
  • kernel-tools-debuginfo-4.18.0-305.184.1.el8_4.x86_64.rpm
  • kernel-4.18.0-305.184.1.el8_4.x86_64.rpm
  • kernel-cross-headers-4.18.0-305.184.1.el8_4.x86_64.rpm
  • kernel-abi-stablelists-4.18.0-305.184.1.el8_4.noarch.rpm
  • kernel-4.18.0-305.184.1.el8_4.src.rpm

Fixes

CVEs

References

Additional information