RHSA-2026:54515: Important: kernel security update

Published Aug 13, 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/sched: actapi: 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.

— Red Hat

Affected Software

39 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for IBM z Systems - 4 years of updates
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux Server - AUS
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for ARM 64 - 4 years of updates
Red Hat Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
redhat/kernel<5.14.0-284.187.1.el9_2
5.14.0-284.187.1.el9_2
redhat/bpftool<7.0.0-284.187.1.el9_2
7.0.0-284.187.1.el9_2
redhat/kernel<5.14.0-284.187.1.el9_2
5.14.0-284.187.1.el9_2
redhat/kernel-abi-stablelists<5.14.0-284.187.1.el9_2
5.14.0-284.187.1.el9_2
redhat/kernel-core<5.14.0-284.187.1.el9_2
5.14.0-284.187.1.el9_2
redhat/kernel-debug<5.14.0-284.187.1.el9_2
5.14.0-284.187.1.el9_2
redhat/kernel-debug-core<5.14.0-284.187.1.el9_2
5.14.0-284.187.1.el9_2
redhat/bpftool<7.0.0-284.187.1.el9_2
7.0.0-284.187.1.el9_2
redhat/kernel<5.14.0-284.187.1.el9_2
5.14.0-284.187.1.el9_2
redhat/kernel-core<5.14.0-284.187.1.el9_2
5.14.0-284.187.1.el9_2
redhat/kernel-debug<5.14.0-284.187.1.el9_2
5.14.0-284.187.1.el9_2
redhat/bpftool<7.0.0-284.187.1.el9_2.aa
7.0.0-284.187.1.el9_2.aa
redhat/kernel<5.14.0-284.187.1.el9_2.aa
5.14.0-284.187.1.el9_2.aa
redhat/kernel<64k-5.14.0-284.187.1.el9_2.aa
64k-5.14.0-284.187.1.el9_2.aa
redhat/kernel<64k-core-5.14.0-284.187.1.el9_2.aa
64k-core-5.14.0-284.187.1.el9_2.aa
redhat/kernel<64k-debug-5.14.0-284.187.1.el9_2.aa
64k-debug-5.14.0-284.187.1.el9_2.aa
redhat/kernel<64k-debug-core-5.14.0-284.187.1.el9_2.aa
64k-debug-core-5.14.0-284.187.1.el9_2.aa
redhat/kernel<64k-debug-modules-5.14.0-284.187.1.el9_2.aa
64k-debug-modules-5.14.0-284.187.1.el9_2.aa
redhat/kernel<64k-debug-modules-core-5.14.0-284.187.1.el9_2.aa
64k-debug-modules-core-5.14.0-284.187.1.el9_2.aa
redhat/kernel<64k-debug-modules-extra-5.14.0-284.187.1.el9_2.aa
64k-debug-modules-extra-5.14.0-284.187.1.el9_2.aa
redhat/kernel<64k-modules-5.14.0-284.187.1.el9_2.aa
64k-modules-5.14.0-284.187.1.el9_2.aa
redhat/kernel<64k-modules-core-5.14.0-284.187.1.el9_2.aa
64k-modules-core-5.14.0-284.187.1.el9_2.aa
redhat/kernel<64k-modules-extra-5.14.0-284.187.1.el9_2.aa
64k-modules-extra-5.14.0-284.187.1.el9_2.aa
redhat/kernel-core<5.14.0-284.187.1.el9_2.aa
5.14.0-284.187.1.el9_2.aa
redhat/kernel-debug<5.14.0-284.187.1.el9_2.aa
5.14.0-284.187.1.el9_2.aa
redhat/kernel-debug-core<5.14.0-284.187.1.el9_2.aa
5.14.0-284.187.1.el9_2.aa
redhat/bpftool<7.0.0-284.187.1.el9_2
7.0.0-284.187.1.el9_2
redhat/kernel-core<5.14.0-284.187.1.el9_2
5.14.0-284.187.1.el9_2
redhat/kernel-debug<5.14.0-284.187.1.el9_2
5.14.0-284.187.1.el9_2
redhat/kernel-debug-modules<5.14.0-284.187.1.el9_2
5.14.0-284.187.1.el9_2

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 5.14.0-284.187.1.el9_2
  2. Upgrade

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

    Fixed in 7.0.0-284.187.1.el9_2
  3. Upgrade

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

    Fixed in 5.14.0-284.187.1.el9_2
  4. Upgrade

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

    Fixed in 5.14.0-284.187.1.el9_2
  5. Upgrade

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

    Fixed in 5.14.0-284.187.1.el9_2
  6. Upgrade

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

    Fixed in 5.14.0-284.187.1.el9_2
  7. Upgrade

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

    Fixed in 7.0.0-284.187.1.el9_2.aa
  8. Upgrade

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

    Fixed in 5.14.0-284.187.1.el9_2.aa
  9. Upgrade

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

    Fixed in 64k-5.14.0-284.187.1.el9_2.aa
  10. Upgrade

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

    Fixed in 64k-core-5.14.0-284.187.1.el9_2.aa
  11. Upgrade

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

    Fixed in 64k-debug-5.14.0-284.187.1.el9_2.aa
  12. Upgrade

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

    Fixed in 64k-debug-core-5.14.0-284.187.1.el9_2.aa
  13. Upgrade

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

    Fixed in 64k-debug-modules-5.14.0-284.187.1.el9_2.aa
  14. Upgrade

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

    Fixed in 64k-debug-modules-core-5.14.0-284.187.1.el9_2.aa
  15. Upgrade

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

    Fixed in 64k-debug-modules-extra-5.14.0-284.187.1.el9_2.aa
  16. Upgrade

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

    Fixed in 64k-modules-5.14.0-284.187.1.el9_2.aa
  17. Upgrade

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

    Fixed in 64k-modules-core-5.14.0-284.187.1.el9_2.aa
  18. Upgrade

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

    Fixed in 64k-modules-extra-5.14.0-284.187.1.el9_2.aa
  19. Upgrade

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

    Fixed in 5.14.0-284.187.1.el9_2.aa
  20. Upgrade

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

    Fixed in 5.14.0-284.187.1.el9_2.aa
  21. Upgrade

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

    Fixed in 5.14.0-284.187.1.el9_2.aa
  22. Upgrade

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

    Fixed in 5.14.0-284.187.1.el9_2
  23. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-53264
  24. Compensating control

    Treat kernel errata as security-relevant and prioritize applying kernel security updates promptly to avoid leaving the system exposed.

  25. Operational

    Reboot the system after applying the kernel security update so the changes take effect.

Event History

Aug 13, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·09:40 AM
Data Sourced
via Red Hat·09:40 AM
Severity
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Frequently Asked Questions

1

What is the severity of RHSA-2026:54515?

The severity of RHSA-2026:54515 is classified as high, with a CVSS score of 7.

2

How do I fix RHSA-2026:54515?

To fix RHSA-2026:54515, update the affected kernel packages to the latest version provided by Red Hat.

3

What are the security issues addressed in RHSA-2026:54515?

RHSA-2026:54515 addresses a security issue related to using RCU with deferred freeing for action lifecycle (CVE-2026-53264).

4

Which software is affected by RHSA-2026:54515?

RHSA-2026:54515 affects Red Hat kernel packages, including redhat/kernel, redhat/bpftool, and redhat/kernel-core.

5

When was RHSA-2026:54515 published?

RHSA-2026:54515 was published on August 13, 2026.

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