RHEL 9 : pacemaker (RHSA-2026:39323)

high Nessus Plugin ID 326899

Synopsis

The remote Red Hat host is missing a security update for pacemaker.

Description

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:39323 advisory.

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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL pacemaker package based on the guidance in RHSA-2026:39323.

Plugin Details

Severity: High

ID: 326899

File Name: redhat-RHSA-2026-39323.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 7/15/2026

Updated: 7/15/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.9

Percentile: 52.75

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:C

CVSS Score Source: CVE-2026-10649

CVSS v3

Risk Factor: High

Base Score: 8.6

Temporal Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:pacemaker-cts, p-cpe:/a:redhat:enterprise_linux:pacemaker-schemas, p-cpe:/a:redhat:enterprise_linux:pacemaker-libs, p-cpe:/a:redhat:enterprise_linux:pacemaker-libs-devel, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:pacemaker-doc, p-cpe:/a:redhat:enterprise_linux:python3-pacemaker, p-cpe:/a:redhat:enterprise_linux:pacemaker-cluster-libs, p-cpe:/a:redhat:enterprise_linux:pacemaker-nagios-plugins-metadata, p-cpe:/a:redhat:enterprise_linux:pacemaker-cli, p-cpe:/a:redhat:enterprise_linux:pacemaker-remote, cpe:/o:redhat:rhel_eus:9.8, p-cpe:/a:redhat:enterprise_linux:pacemaker

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 7/14/2026

Vulnerability Publication Date: 6/16/2026

Reference Information

CVE: CVE-2026-10649

CWE: 190

RHSA: 2026:39323

Detections

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