RHSA-2026:35894: Important: kernel security update

Published Jul 6, 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: Bluetooth: SCO: Fix use-after-free in scorecvframe() due to missing sockhold (CVE-2026-31408) 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: gfs2: Fix use-after-free in iomap inline data write path (CVE-2026-45984) kernel: RDMA/mlx4: Fix mis-use of RCU in mlx4srqevent() (CVE-2026-46181) 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 Server - AUS
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension
redhat/kernel<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/bpftool<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/bpftool-debuginfo<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/kernel<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/kernel-abi-stablelists<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/kernel-core<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/kernel-cross-headers<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/kernel-debug<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/kernel-debug-core<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/kernel-debug-debuginfo<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/kernel-debug-devel<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/kernel-debug-modules<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/kernel-debug-modules-extra<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/kernel-debuginfo<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/kernel-devel<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/kernel-doc<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/kernel-headers<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/kernel-modules<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/kernel-modules-extra<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/kernel-tools<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/kernel-tools-debuginfo<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/kernel-tools-libs<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/perf<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/perf-debuginfo<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/python3-perf<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.el8_6
redhat/python3-perf-debuginfo<4.18.0-372.199.1.el8_6
4.18.0-372.199.1.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 4.18.0-372.199.1.el8_6
  2. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  3. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  4. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  5. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  6. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  7. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  8. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  9. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  10. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  11. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  12. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  13. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  14. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  15. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  16. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  17. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  18. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  19. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  20. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  21. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  22. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  23. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  24. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  25. Upgrade

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

    Fixed in 4.18.0-372.199.1.el8_6
  26. Upgrade

    Upgrade kernel packages to a version that resolves this vulnerability.

    Patch CVE-2026-43279
  27. Upgrade

    Upgrade kernel packages to a version that resolves this vulnerability.

    Patch CVE-2026-46181
  28. Upgrade

    Upgrade kernel packages to a version that resolves this vulnerability.

    Patch CVE-2026-45984
  29. Upgrade

    Upgrade kernel packages to a version that resolves this vulnerability.

    Patch CVE-2026-31669
  30. Upgrade

    Upgrade kernel packages to a version that resolves this vulnerability.

    Patch CVE-2026-43198
  31. Upgrade

    Upgrade kernel packages to a version that resolves this vulnerability.

    Patch CVE-2026-31408
  32. Operational

    Reboot the system for this kernel security update to take 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·01:05 PM
Data Sourced
via Red Hat·01:05 PM
Severity
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Frequently Asked Questions

1

What is the severity of RHSA-2026:35894?

The severity of RHSA-2026:35894 is high, rated at 7 on the severity scale.

2

What vulnerabilities are addressed in RHSA-2026:35894?

RHSA-2026:35894 addresses vulnerabilities related to use-after-free issues in Bluetooth and mptcp components.

3

How do I fix RHSA-2026:35894?

You can fix RHSA-2026:35894 by applying the kernel security update provided by Red Hat.

4

Which software packages are affected by RHSA-2026:35894?

The affected software packages include various kernel packages for Red Hat Enterprise Linux Server and associated tools.

5

What is the impact of the vulnerabilities in RHSA-2026:35894?

The vulnerabilities could potentially allow attackers to exploit use-after-free conditions, leading to system instability or crashes.

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