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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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade pacemaker-schemasUpgrade pacemaker-nagios-plugins-metadataUpgrade pacemakerUpgrade pacemaker-docUpgrade pacemaker-cliUpgrade python3-pacemakerUpgrade pacemaker-ctsUpgrade pacemaker-cluster-libsUpgrade pacemaker-remoteUpgrade pacemaker-libsUpgrade pacemaker-libs-devel | Jul 15, 2026 | Jul 14, 2026 |
| Oracle_linux | — | Upgrade pacemaker-cliUpgrade pacemaker-libsUpgrade pacemaker-cluster-libsUpgrade pacemaker-remoteUpgrade pacemakerUpgrade pacemaker-schemas | Oct 22, 2026 | Jun 16, 2026 |
| Redhat_linux | — | Upgrade pacemaker-cluster-libs-debuginfoUpgrade pacemaker-schemasUpgrade pacemaker-remoteUpgrade pacemaker-libs-develUpgrade pacemaker-libsUpgrade pacemaker-cli-debuginfoUpgrade pacemaker-debuginfoUpgrade pacemaker-cliUpgrade pacemaker-nagios-plugins-metadataUpgrade pacemaker-cluster-libsUpgrade pacemaker-debugsourceUpgrade pacemaker-docUpgrade pacemaker-ctsUpgrade pacemaker-remote-debuginfoUpgrade python3-pacemakerUpgrade pacemakerUpgrade pacemaker-libs-debuginfo | Jul 16, 2026 | Jun 16, 2026 |
| Rocky_linux | — | Upgrade pacemaker-debuginfoUpgrade pacemaker-cluster-libsUpgrade pacemaker-remote-debuginfoUpgrade pacemaker-cli-debuginfoUpgrade pacemaker-debugsourceUpgrade pacemaker-libs-debuginfoUpgrade pacemakerUpgrade pacemaker-libs-develUpgrade pacemaker-cluster-libs-debuginfoUpgrade pacemaker-remoteUpgrade pacemaker-libsUpgrade pacemaker-cli | Jul 17, 2026 | Jul 15, 2026 |
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