RHSA-2026:62345: Important: kernel security update

Published Sep 2, 2026
·
Updated

Important: kernel security update

Other sources

The kernel packages contain the Linux kernel, the core of any Linux operating system.Security Fix(es): kernel: net: bridge: stop fast-leave after deleting a port group (CVE-2026-74480) 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.

— Red Hat

Affected Software

54 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions
Red Hat Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Life Cycle Long Life
Red Hat Red Hat Enterprise Linux Server - TUS
redhat/kernel<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/bpftool<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/bpftool-debuginfo<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-abi-stablelists<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-core<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-cross-headers<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-debug<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-debug-core<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-debug-debuginfo<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-debug-devel<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-debug-modules<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-debug-modules-extra<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-debuginfo<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-devel<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-doc<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-headers<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-modules<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-modules-extra<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-tools<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-tools-debuginfo<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-tools-libs<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/perf<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/perf-debuginfo<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/python3-perf<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/python3-perf-debuginfo<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/bpftool<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/bpftool-debuginfo<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-core<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-cross-headers<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-debug<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-debug-core<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-debug-debuginfo<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-debug-devel<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-debug-modules<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-debug-modules-extra<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-debuginfo<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-debuginfo-common-ppc64le<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-devel<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-headers<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-modules<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-modules-extra<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-tools<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-tools-debuginfo<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/kernel-tools-libs<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/perf<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/perf-debuginfo<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/python3-perf<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8
redhat/python3-perf-debuginfo<4.18.0-477.164.1.el8_8
4.18.0-477.164.1.el8_8

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  2. Upgrade

    Upgrade redhat/bpftool to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  3. Upgrade

    Upgrade redhat/bpftool-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  4. Upgrade

    Upgrade redhat/kernel-abi-stablelists to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  5. Upgrade

    Upgrade redhat/kernel-core to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  6. Upgrade

    Upgrade redhat/kernel-cross-headers to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  7. Upgrade

    Upgrade redhat/kernel-debug to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  8. Upgrade

    Upgrade redhat/kernel-debug-core to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  9. Upgrade

    Upgrade redhat/kernel-debug-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  10. Upgrade

    Upgrade redhat/kernel-debug-devel to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  11. Upgrade

    Upgrade redhat/kernel-debug-modules to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  12. Upgrade

    Upgrade redhat/kernel-debug-modules-extra to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  13. Upgrade

    Upgrade redhat/kernel-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  14. Upgrade

    Upgrade redhat/kernel-devel to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  15. Upgrade

    Upgrade redhat/kernel-doc to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  16. Upgrade

    Upgrade redhat/kernel-headers to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  17. Upgrade

    Upgrade redhat/kernel-modules to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  18. Upgrade

    Upgrade redhat/kernel-modules-extra to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  19. Upgrade

    Upgrade redhat/kernel-tools to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  20. Upgrade

    Upgrade redhat/kernel-tools-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  21. Upgrade

    Upgrade redhat/kernel-tools-libs to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  22. Upgrade

    Upgrade redhat/perf to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  23. Upgrade

    Upgrade redhat/perf-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  24. Upgrade

    Upgrade redhat/python3-perf to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  25. Upgrade

    Upgrade redhat/python3-perf-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  26. Upgrade

    Upgrade redhat/kernel-debuginfo-common-ppc64le to a version that resolves this vulnerability.

    Fixed in 4.18.0-477.164.1.el8_8
  27. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-74480
  28. Operational

    Reboot the system for the kernel security update to take effect.

Event History

Sep 2, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·12:03 AM
Data Sourced
via Red Hat·12:03 AM
Severity

Frequently Asked Questions

1

Which systems are potentially affected by this update?

Systems using the listed Red Hat kernel packages are potentially affected, including kernel, kernel-core, kernel-debug, kernel-debug-core, bpftool, and their associated debug or header packages.

2

What component is involved in the security fix?

The fix addresses CVE-2026-74480 in the Linux kernel networking bridge code, specifically fast-leave handling after a port group is deleted.

Company

Resources

Contact

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