Description
Pacemaker 1.1.10, when remote Cluster Information Base (CIB) configuration or resource management is enabled, does not limit the duration of connections to the blocking sockets, which allows remote attackers to cause a denial of service (connection blocking).
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | pacemaker | 1.1.10-1 | — |
| Debian 13 | pacemaker | 1.1.10-1 | — |
| Debian 12 | pacemaker | 1.1.10-1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | pacemaker +7 | 1.1.10-14.el6 | RHSA-2013:1635 |
Advisories 1
- RHSA-2013:1635 Red Hat Security Advisory: pacemaker security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 26, 2026