RHSA-2026:52649: Important: kernel security update

Published Aug 10, 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: xen/privcmd: fix double free via VMA splitting (CVE-2026-31787) kernel: fs/smb/client: fix out-of-bounds read in cifssanitizeprepath (CVE-2026-43112) kernel: selinux: fix overlayfs mmap() and mprotect() access checks (CVE-2026-46054) kernel: Arm Processors: Privilege escalation or information disclosure via writes to higher exception level resources (CVE-2025-10263) kernel: ipc: limit nextid allocation to the valid ID range (CVE-2026-52923) kernel: dm log: fix out-of-bounds write due to regioncount overflow (CVE-2026-53059) 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 - Extended Life Cycle Long Life
Red Hat Red Hat Enterprise Linux Server - TUS
Red Hat Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions
redhat/kernel<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/bpftool<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/bpftool-debuginfo<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-abi-stablelists<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-core<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-cross-headers<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-debug<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-debug-core<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-debug-debuginfo<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-debug-devel<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-debug-modules<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-debug-modules-extra<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-debuginfo<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-devel<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-doc<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-headers<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-modules<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-modules-extra<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-tools<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-tools-debuginfo<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-tools-libs<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/perf<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/perf-debuginfo<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/python3-perf<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/python3-perf-debuginfo<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/bpftool<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/bpftool-debuginfo<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-core<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-cross-headers<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-debug<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-debug-core<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-debug-debuginfo<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-debug-devel<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-debug-modules<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-debug-modules-extra<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-debuginfo<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-debuginfo-common-ppc64le<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-devel<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-headers<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-modules<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-modules-extra<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-tools<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-tools-debuginfo<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/kernel-tools-libs<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/perf<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/perf-debuginfo<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/python3-perf<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.el8_8
redhat/python3-perf-debuginfo<4.18.0-477.158.1.el8_8
4.18.0-477.158.1.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 4.18.0-477.158.1.el8_8
  2. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  3. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  4. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  5. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  6. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  7. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  8. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  9. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  10. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  11. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  12. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  13. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  14. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  15. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  16. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  17. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  18. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  19. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  20. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  21. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  22. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  23. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  24. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  25. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  26. Upgrade

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

    Fixed in 4.18.0-477.158.1.el8_8
  27. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

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

Event History

Aug 10, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·05:19 AM
Data Sourced
via Red Hat·05:19 AM
Severity
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Frequently Asked Questions

1

What is the severity of RHSA-2026:52649?

The severity of RHSA-2026:52649 is rated as high with a score of 7.

2

How do I fix RHSA-2026:52649?

To fix RHSA-2026:52649, you need to apply the recommended security updates for your Red Hat Enterprise Linux version.

3

What affected software versions are impacted by RHSA-2026:52649?

RHSA-2026:52649 impacts Red Hat Enterprise Linux for x86_64, Red Hat Enterprise Linux Server, and Red Hat Enterprise Linux for Power LE among others.

4

What type of issue does RHSA-2026:52649 address?

RHSA-2026:52649 addresses important kernel security vulnerabilities.

5

When was RHSA-2026:52649 published?

RHSA-2026:52649 was published on August 10, 2026.

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