RHSA-2026:35863: Important: kernel security, bug fix, and enhancement update

Published Jul 6, 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: Linux kernel: Use-after-free in traffic control (actct) may lead to denial of service or privilege escalation (CVE-2026-23270) kernel: netfilter: nfconntrackh323: check for zero length in DecodeQ931() (CVE-2026-23455) kernel: mptcp: fix slab-use-after-free in inetlookupestablished (CVE-2026-31669) kernel: ALSA: usb-audio: Add sanity check for OOB writes at silencing (CVE-2026-43279) kernel: tcp: fix potential race in tcpv6synrecvsock() (CVE-2026-43198) 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: RDMA/mlx4: Fix mis-use of RCU in mlx4srqevent() (CVE-2026-46181) Bug Fix(es) and Enhancement(s): NVMe-FC: Panic during NVMe Controller Reset tests (JIRA:RHEL-178449) 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 Server for Power LE - Update Services for SAP Solutions
Red Hat Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions
Red Hat Red Hat Enterprise Linux Server - TUS
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension
redhat/kernel<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/bpftool<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/bpftool-debuginfo<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-abi-stablelists<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-core<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-cross-headers<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-debug<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-debug-core<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-debug-debuginfo<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-debug-devel<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-debug-modules<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-debug-modules-extra<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-debuginfo<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-devel<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-doc<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-headers<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-modules<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-modules-extra<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-tools<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-tools-debuginfo<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-tools-libs<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/perf<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/perf-debuginfo<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/python3-perf<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/python3-perf-debuginfo<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/bpftool<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/bpftool-debuginfo<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-core<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-cross-headers<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-debug<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-debug-core<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-debug-debuginfo<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-debug-devel<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-debug-modules<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-debug-modules-extra<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-debuginfo<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-debuginfo-common-ppc64le<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-devel<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-headers<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-modules<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-modules-extra<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-tools<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-tools-debuginfo<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/kernel-tools-libs<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/perf<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/perf-debuginfo<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/python3-perf<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.el8_8
redhat/python3-perf-debuginfo<4.18.0-477.150.1.el8_8
4.18.0-477.150.1.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 4.18.0-477.150.1.el8_8
  2. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  3. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  4. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  5. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  6. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  7. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  8. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  9. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  10. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  11. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  12. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  13. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  14. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  15. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  16. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  17. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  18. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  19. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  20. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  21. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  22. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  23. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  24. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  25. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  26. Upgrade

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

    Fixed in 4.18.0-477.150.1.el8_8
  27. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch JIRA:RHEL-178449
  28. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-46090
  29. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-43279
  30. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-46181
  31. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-45852
  32. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-43125
  33. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-31669
  34. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-43329
  35. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-23455
  36. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-43198
  37. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Patch CVE-2026-23270
  38. Operational

    Reboot the system after applying the kernel update so it takes effect.

Event History

Jul 6, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·04:13 AM
Data Sourced
via Red Hat·04:13 AM
Severity
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Frequently Asked Questions

1

What is the severity of RHSA-2026:35863?

The severity of RHSA-2026:35863 is classified as high with a score of 7.

2

What vulnerabilities are addressed in RHSA-2026:35863?

RHSA-2026:35863 addresses a use-after-free vulnerability in the traffic control subsystem leading to potential denial of service or privilege escalation.

3

How do I fix RHSA-2026:35863?

To fix RHSA-2026:35863, you should update your kernel packages to the latest version provided by Red Hat.

4

What impact does the vulnerability in RHSA-2026:35863 have on my system?

The vulnerability in RHSA-2026:35863 may lead to a denial of service or privilege escalation on affected systems.

5

Which packages are impacted by RHSA-2026:35863?

The impacted packages include redhat/kernel, redhat/bpftool, and various kernel-related packages.

Company

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