RHSA-2026:33899: Important: kernel security, bug fix, and enhancement update

Published Jul 1, 2026
·
Updated

Important: kernel security, bug fix, and enhancement update

Other sources

The kernel packages contain the Linux kernel, the core of any Linux operating system.Security Fix(es): kernel: libceph: make decodepool() more resilient against corrupted osdmaps (CVE-2025-71116) kernel: libceph: prevent potential out-of-bounds reads in handleauthdone() (CVE-2026-22984) kernel: libceph: replace overzealous BUGON in osdmapapplyincremental() (CVE-2026-22990) kernel: netfilter: nfconntrackh323: check for zero length in DecodeQ931() (CVE-2026-23455) kernel: dlm: validate length in dlmsearchrsbtree (CVE-2026-43125) kernel: netfilter: flowtable: strictly check for maximum number of actions (CVE-2026-43329) kernel: ALSA: aloop: Fix peer runtime UAF during format-change stop (CVE-2026-46090) kernel: RDMA/rxe: Fix double free in rxesrqfrominit (CVE-2026-45852) kernel: sctp: revalidate list cursor after sctpsendmsgtoasoc() in SCTPSENDALL (CVE-2026-46227) Bug Fix(es) and Enhancement(s): NVMe-FC: Panic during NVMe Controller Reset tests (JIRA:RHEL-178448) 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

28 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension
Red Hat Red Hat Enterprise Linux Server - AUS
redhat/kernel<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/bpftool<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/bpftool-debuginfo<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/kernel<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/kernel-abi-stablelists<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/kernel-core<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/kernel-cross-headers<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/kernel-debug<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/kernel-debug-core<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/kernel-debug-debuginfo<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/kernel-debug-devel<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/kernel-debug-modules<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/kernel-debug-modules-extra<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/kernel-debuginfo<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/kernel-devel<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/kernel-doc<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/kernel-headers<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/kernel-modules<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/kernel-modules-extra<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/kernel-tools<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/kernel-tools-debuginfo<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/kernel-tools-libs<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/perf<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/perf-debuginfo<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/python3-perf<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6
redhat/python3-perf-debuginfo<4.18.0-372.198.1.el8_6
4.18.0-372.198.1.el8_6

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  2. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  3. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  4. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  5. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  6. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  7. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  8. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  9. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  10. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  11. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  12. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  13. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  14. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  15. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  16. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  17. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  18. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  19. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  20. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  21. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  22. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  23. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  24. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  25. Upgrade

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

    Fixed in 4.18.0-372.198.1.el8_6
  26. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch JIRA:RHEL-178448
  27. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-46090
  28. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-45852
  29. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-43125
  30. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-22984
  31. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-22990
  32. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-43329
  33. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-23455
  34. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-46227
  35. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2025-71116
  36. Operational

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

Event History

Jul 1, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·12:05 AM
Data Sourced
via Red Hat·12:05 AM
Severity
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Frequently Asked Questions

1

What is the severity of RHSA-2026:33899?

The severity of RHSA-2026:33899 is rated as high with a score of 7.

2

What are the main security fixes in RHSA-2026:33899?

RHSA-2026:33899 includes security fixes related to the libceph component, specifically addressing vulnerabilities in the decode_pool function.

3

How do I fix RHSA-2026:33899?

To fix RHSA-2026:33899, you should update the affected kernel packages to their latest versions as provided by Red Hat.

4

What systems are affected by RHSA-2026:33899?

RHSA-2026:33899 affects Red Hat Enterprise Linux for x86_64 systems with Extended Update Support and related kernel packages.

5

Is RHSA-2026:33899 related to any specific vulnerabilities?

Yes, RHSA-2026:33899 addresses vulnerabilities including CVE-2025-71116, which pertains to a double free issue in libceph.

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