RHSA-2026:54247: Moderate: kernel-rt security update

Published Aug 12, 2026
·
Updated

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: udf: fix partition descriptor append bookkeeping (CVE-2026-45991) kernel: ice: fix double-free of txbuf skb (CVE-2026-53009) 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.

Affected Software

15 affected componentsFixes available
redhat/kernel-rt<4.18.0-553.155.1.rt7.496.el8_10
4.18.0-553.155.1.rt7.496.el8_10
redhat/kernel-rt<4.18.0-553.155.1.rt7.496.el8_10
4.18.0-553.155.1.rt7.496.el8_10
redhat/kernel-rt-core<4.18.0-553.155.1.rt7.496.el8_10
4.18.0-553.155.1.rt7.496.el8_10
redhat/kernel-rt-debug<4.18.0-553.155.1.rt7.496.el8_10
4.18.0-553.155.1.rt7.496.el8_10
redhat/kernel-rt-debug-core<4.18.0-553.155.1.rt7.496.el8_10
4.18.0-553.155.1.rt7.496.el8_10
redhat/kernel-rt-debug-debuginfo<4.18.0-553.155.1.rt7.496.el8_10
4.18.0-553.155.1.rt7.496.el8_10
redhat/kernel-rt-debug-devel<4.18.0-553.155.1.rt7.496.el8_10
4.18.0-553.155.1.rt7.496.el8_10
redhat/kernel-rt-debug-modules<4.18.0-553.155.1.rt7.496.el8_10
4.18.0-553.155.1.rt7.496.el8_10
redhat/kernel-rt-debug-modules-extra<4.18.0-553.155.1.rt7.496.el8_10
4.18.0-553.155.1.rt7.496.el8_10
redhat/kernel-rt-debuginfo<4.18.0-553.155.1.rt7.496.el8_10
4.18.0-553.155.1.rt7.496.el8_10
redhat/kernel-rt-devel<4.18.0-553.155.1.rt7.496.el8_10
4.18.0-553.155.1.rt7.496.el8_10
redhat/kernel-rt-modules<4.18.0-553.155.1.rt7.496.el8_10
4.18.0-553.155.1.rt7.496.el8_10
redhat/kernel-rt-modules-extra<4.18.0-553.155.1.rt7.496.el8_10
4.18.0-553.155.1.rt7.496.el8_10
redhat/kernel-rt-debug-kvm<4.18.0-553.155.1.rt7.496.el8_10
4.18.0-553.155.1.rt7.496.el8_10
redhat/kernel-rt-kvm<4.18.0-553.155.1.rt7.496.el8_10
4.18.0-553.155.1.rt7.496.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 4.18.0-553.155.1.rt7.496.el8_10
  2. Upgrade

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

    Fixed in 4.18.0-553.155.1.rt7.496.el8_10
  3. Upgrade

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

    Fixed in 4.18.0-553.155.1.rt7.496.el8_10
  4. Upgrade

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

    Fixed in 4.18.0-553.155.1.rt7.496.el8_10
  5. Upgrade

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

    Fixed in 4.18.0-553.155.1.rt7.496.el8_10
  6. Upgrade

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

    Fixed in 4.18.0-553.155.1.rt7.496.el8_10
  7. Upgrade

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

    Fixed in 4.18.0-553.155.1.rt7.496.el8_10
  8. Upgrade

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

    Fixed in 4.18.0-553.155.1.rt7.496.el8_10
  9. Upgrade

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

    Fixed in 4.18.0-553.155.1.rt7.496.el8_10
  10. Upgrade

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

    Fixed in 4.18.0-553.155.1.rt7.496.el8_10
  11. Upgrade

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

    Fixed in 4.18.0-553.155.1.rt7.496.el8_10
  12. Upgrade

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

    Fixed in 4.18.0-553.155.1.rt7.496.el8_10
  13. Upgrade

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

    Fixed in 4.18.0-553.155.1.rt7.496.el8_10
  14. Upgrade

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

    Fixed in 4.18.0-553.155.1.rt7.496.el8_10
  15. Upgrade

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

    Patch CVE-2026-53009
  16. Upgrade

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

    Patch CVE-2026-45991
  17. Operational

    Reboot the system after applying the kernel-rt security update so the changes take effect.

Event History

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

1

What is the security severity of RHSA-2026:54247?

The security severity of RHSA-2026:54247 is classified as moderate.

2

What vulnerabilities are addressed in RHSA-2026:54247?

RHSA-2026:54247 addresses the vulnerabilities CVE-2026-45991 and CVE-2026-53009.

3

How do I fix the vulnerabilities in RHSA-2026:54247?

To fix the vulnerabilities in RHSA-2026:54247, you should update the affected kernel-rt packages to the latest version.

4

Which packages are affected by RHSA-2026:54247?

The affected packages in RHSA-2026:54247 include redhat/kernel-rt, redhat/kernel-rt-core, and others related to kernel-rt.

5

When was RHSA-2026:54247 published?

RHSA-2026:54247 was published on August 12, 2026.

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