RHSA-2026:42041: Important: pacemaker security update

Published Jul 20, 2026
·
Updated

Important: pacemaker security update

Other sources

The Pacemaker cluster resource manager is a collection of technologies working together to maintain data integrity and application availability in the event of failures. Security Fix(es): pacemaker: Pacemaker: Denial of Service via integer overflow in remote message decompression (CVE-2026-10649) 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

46 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Life Cycle Long Life
Red Hat Red Hat Enterprise Linux Server - TUS
Red Hat Red Hat Enterprise Linux High Availability for x86_64 - Telecommunications Update Service
Red Hat Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions
Red Hat Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat Red Hat Enterprise Linux High Availability for x86_64 - Update Services for SAP Solutions
Red Hat Red Hat Enterprise Linux High Availability for x86_64 - Extended Life Cycle Long Life
Red Hat Red Hat Enterprise Linux High Availability for Power LE - Update Services for SAP Solutions
redhat/pacemaker<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-cli-debuginfo<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-cli-debuginfo<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-cluster-libs<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-cluster-libs<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-cluster-libs-debuginfo<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-cluster-libs-debuginfo<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-debuginfo<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-debuginfo<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-debugsource<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-debugsource<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-libs<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-libs<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-libs-debuginfo<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-libs-debuginfo<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-remote-debuginfo<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-remote-debuginfo<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-schemas<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-cli-debuginfo<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-cluster-libs<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-cluster-libs-debuginfo<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-debuginfo<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-debugsource<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-libs<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-libs-debuginfo<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-remote-debuginfo<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-cli<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-cts<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-doc<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-libs-devel<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-nagios-plugins-metadata<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-remote<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-cli<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-libs-devel<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-libs-devel<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8
redhat/pacemaker-remote<2.1.5-9.7.el8_8
2.1.5-9.7.el8_8

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 2.1.5-9.7.el8_8
  2. Upgrade

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

    Fixed in 2.1.5-9.7.el8_8
  3. Upgrade

    Upgrade redhat/pacemaker-cluster-libs to a version that resolves this vulnerability.

    Fixed in 2.1.5-9.7.el8_8
  4. Upgrade

    Upgrade redhat/pacemaker-cluster-libs-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.1.5-9.7.el8_8
  5. Upgrade

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

    Fixed in 2.1.5-9.7.el8_8
  6. Upgrade

    Upgrade redhat/pacemaker-debugsource to a version that resolves this vulnerability.

    Fixed in 2.1.5-9.7.el8_8
  7. Upgrade

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

    Fixed in 2.1.5-9.7.el8_8
  8. Upgrade

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

    Fixed in 2.1.5-9.7.el8_8
  9. Upgrade

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

    Fixed in 2.1.5-9.7.el8_8
  10. Upgrade

    Upgrade redhat/pacemaker-schemas to a version that resolves this vulnerability.

    Fixed in 2.1.5-9.7.el8_8
  11. Upgrade

    Upgrade redhat/pacemaker-cli to a version that resolves this vulnerability.

    Fixed in 2.1.5-9.7.el8_8
  12. Upgrade

    Upgrade redhat/pacemaker-cts to a version that resolves this vulnerability.

    Fixed in 2.1.5-9.7.el8_8
  13. Upgrade

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

    Fixed in 2.1.5-9.7.el8_8
  14. Upgrade

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

    Fixed in 2.1.5-9.7.el8_8
  15. Upgrade

    Upgrade redhat/pacemaker-nagios-plugins-metadata to a version that resolves this vulnerability.

    Fixed in 2.1.5-9.7.el8_8
  16. Upgrade

    Upgrade redhat/pacemaker-remote to a version that resolves this vulnerability.

    Fixed in 2.1.5-9.7.el8_8
  17. Upgrade

    Upgrade pacemaker to a version that resolves this vulnerability.

    Patch CVE-2026-10649

Event History

Jul 20, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·01:13 PM
Data Sourced
via Red Hat·01:13 PM
Severity
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Frequently Asked Questions

1

What is the severity of RHSA-2026:42041?

The severity of RHSA-2026:42041 is rated high with a score of 7.

2

What vulnerability is addressed in RHSA-2026:42041?

RHSA-2026:42041 addresses a Denial of Service vulnerability caused by an integer overflow in the Pacemaker cluster resource manager.

3

How do I fix RHSA-2026:42041?

To fix RHSA-2026:42041, ensure that your installation of Pacemaker is updated to the latest version provided by Red Hat.

4

What products are affected by RHSA-2026:42041?

The affected products include redhat/pacemaker, redhat/pacemaker-cli-debuginfo, and several libraries associated with Pacemaker.

5

What could happen if RHSA-2026:42041 is not addressed?

If RHSA-2026:42041 is not addressed, it may lead to a Denial of Service, impacting the availability of applications managed by Pacemaker.

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