CVE-2026-10649

Pacemaker: pacemaker: denial of service via integer overflow in remote message decompression

At a glance

Severity: HIGH 8.6
EPSS: EPSS 0.56 % · percentile 46 (2026-10-27)
State: PUBLISHED
Published: 2026-06-16
Updated: 2026-08-21
Assigner: redhat
NVD status: Awaiting Analysis

Description

A flaw was found in Pacemaker. An unauthenticated remote attacker can exploit an integer overflow vulnerability in the remote message decompression process. By sending a specially crafted compressed remote message before authentication, an attacker can cause memory corruption, leading to a denial of service (DoS) in the CIB remote listener. This can result in the affected service crashing.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 8.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H	redhat
CVSS 3.1	HIGH 8.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H	redhat-SADP
CVSS 3.1	HIGH 8.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H	NVD · secalert@redhat.com (Secondary)
CVSS 3.1	HIGH 8.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H	NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary)

Weaknesses (CWE)

CWE-190

European references

ENISA EUVD · EUVD-2026-37128
GCVE · GCVE-0-2026-10649

CERT-FR advisories

CERTFR-2026-AVI-1336 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
CERTFR-2026-AVI-1165 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr

Affected products

Product	Versions
Red Hat · Red Hat Enterprise Linux 10	unaffected 0:3.0.1-5.el10_2.1 < *
Red Hat · Red Hat Enterprise Linux 10.0 Extended Update Support	unaffected 0:3.0.0-5.3.el10_0 < *
Red Hat · Red Hat Enterprise Linux 7 Extended Lifecycle Support	unaffected 0:1.1.23-1.el7_9.2 < *
Red Hat · Red Hat Enterprise Linux 8	unaffected 0:2.1.7-5.6.el8_10 < *
Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	unaffected 0:2.0.5-9.el8_4.12 < *
Red Hat · Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	unaffected 0:2.0.5-9.el8_4.12 < *
Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	unaffected 0:2.1.2-4.el8_6.11 < *
Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	unaffected 0:2.1.2-4.el8_6.11 < *
Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update Service	unaffected 0:2.1.5-9.7.el8_8 < *
Red Hat · Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions	unaffected 0:2.1.5-9.7.el8_8 < *
Red Hat · Red Hat Enterprise Linux 9	unaffected 0:2.1.10-3.el9_8 < *
Red Hat · Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions	unaffected 0:2.1.5-9.el9_2.7 < *
Red Hat · Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions	unaffected 0:2.1.7-5.5.el9_4 < *
Red Hat · Red Hat Enterprise Linux 9.6 Extended Update Support	unaffected 0:2.1.9-1.4.el9_6 < *
Red Hat · Red Hat Enterprise Linux 6
Red Hat · Red Hat OpenShift Container Platform 4

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD