RHSA-2026:49851: Moderate: kernel-rt security, bug fix, and enhancement update

Published Aug 4, 2026
·
Updated

Moderate: kernel-rt security, bug fix, and enhancement update

Other sources

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.Security Fix(es): kernel: ipc: limit nextid allocation to the valid ID range (CVE-2026-52923) Bug Fix(es) and Enhancement(s): RHEL8.10 - KVM: s390: Limit adapter indicator access to mapped page (JIRA:RHEL-183880) CIFS mounts do not work with the latest kernel (JIRA:RHEL-213976) 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

18 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for Real Time
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for Real Time for NFV
redhat/kernel-rt<4.18.0-553.151.1.rt7.492.el8_10
4.18.0-553.151.1.rt7.492.el8_10
redhat/kernel-rt<4.18.0-553.151.1.rt7.492.el8_10
4.18.0-553.151.1.rt7.492.el8_10
redhat/kernel-rt-core<4.18.0-553.151.1.rt7.492.el8_10
4.18.0-553.151.1.rt7.492.el8_10
redhat/kernel-rt-debug<4.18.0-553.151.1.rt7.492.el8_10
4.18.0-553.151.1.rt7.492.el8_10
redhat/kernel-rt-debug-core<4.18.0-553.151.1.rt7.492.el8_10
4.18.0-553.151.1.rt7.492.el8_10
redhat/kernel-rt-debug-debuginfo<4.18.0-553.151.1.rt7.492.el8_10
4.18.0-553.151.1.rt7.492.el8_10
redhat/kernel-rt-debug-devel<4.18.0-553.151.1.rt7.492.el8_10
4.18.0-553.151.1.rt7.492.el8_10
redhat/kernel-rt-debug-modules<4.18.0-553.151.1.rt7.492.el8_10
4.18.0-553.151.1.rt7.492.el8_10
redhat/kernel-rt-debug-modules-extra<4.18.0-553.151.1.rt7.492.el8_10
4.18.0-553.151.1.rt7.492.el8_10
redhat/kernel-rt-debuginfo<4.18.0-553.151.1.rt7.492.el8_10
4.18.0-553.151.1.rt7.492.el8_10
redhat/kernel-rt-devel<4.18.0-553.151.1.rt7.492.el8_10
4.18.0-553.151.1.rt7.492.el8_10
redhat/kernel-rt-modules<4.18.0-553.151.1.rt7.492.el8_10
4.18.0-553.151.1.rt7.492.el8_10
redhat/kernel-rt-modules-extra<4.18.0-553.151.1.rt7.492.el8_10
4.18.0-553.151.1.rt7.492.el8_10
redhat/kernel-rt-debug-kvm<4.18.0-553.151.1.rt7.492.el8_10
4.18.0-553.151.1.rt7.492.el8_10
redhat/kernel-rt-kvm<4.18.0-553.151.1.rt7.492.el8_10
4.18.0-553.151.1.rt7.492.el8_10

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 4.18.0-553.151.1.rt7.492.el8_10
  2. Upgrade

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

    Fixed in 4.18.0-553.151.1.rt7.492.el8_10
  3. Upgrade

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

    Fixed in 4.18.0-553.151.1.rt7.492.el8_10
  4. Upgrade

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

    Fixed in 4.18.0-553.151.1.rt7.492.el8_10
  5. Upgrade

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

    Fixed in 4.18.0-553.151.1.rt7.492.el8_10
  6. Upgrade

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

    Fixed in 4.18.0-553.151.1.rt7.492.el8_10
  7. Upgrade

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

    Fixed in 4.18.0-553.151.1.rt7.492.el8_10
  8. Upgrade

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

    Fixed in 4.18.0-553.151.1.rt7.492.el8_10
  9. Upgrade

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

    Fixed in 4.18.0-553.151.1.rt7.492.el8_10
  10. Upgrade

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

    Fixed in 4.18.0-553.151.1.rt7.492.el8_10
  11. Upgrade

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

    Fixed in 4.18.0-553.151.1.rt7.492.el8_10
  12. Upgrade

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

    Fixed in 4.18.0-553.151.1.rt7.492.el8_10
  13. Upgrade

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

    Fixed in 4.18.0-553.151.1.rt7.492.el8_10
  14. Upgrade

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

    Fixed in 4.18.0-553.151.1.rt7.492.el8_10
  15. Upgrade

    Upgrade kernel-rt to a version that resolves this vulnerability.

    Patch CVE-2026-52923

Event History

Aug 4, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·01:48 AM
Data Sourced
via Red Hat·01:48 AM
Severity
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Frequently Asked Questions

1

What is the severity of RHSA-2026:49851?

The severity of RHSA-2026:49851 is classified as medium with a score of 4.

2

What vulnerabilities are addressed in RHSA-2026:49851?

RHSA-2026:49851 addresses a security fix for CVE-2026-52923 relating to IPC ID allocation limits.

3

How do I fix RHSA-2026:49851?

To fix RHSA-2026:49851, it is recommended to update the kernel-rt packages to the latest version provided by Red Hat.

4

What software is affected by RHSA-2026:49851?

The affected software includes various kernel-rt packages for Red Hat Enterprise Linux for Real Time and Extended Life Cycle.

5

What is the impact of RHSA-2026:49851?

The impact of RHSA-2026:49851 includes improvements in security and bug fixes for the Real Time Linux Kernel.

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