Description
A vulnerability was found in the PCS project. This issue occurs due to incorrect permissions on a Unix socket used for internal communication between PCS daemons. A privilege escalation could happen by obtaining an authentication token for a hacluster user. With the "hacluster" token, this flaw allows an attacker to have complete control over the cluster managed by PCS.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | ClusterLabs/pcs | Affects v0.10.5 and later including all 0.11.x. | — |
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 | pcs | 0.11.3-2 | — |
| Debian 13 | pcs | 0.11.3-2 | — |
| Debian 12 | pcs | 0.11.3-2 | — |
| Debian 11 | pcs | 0.10.8-1+deb11u1 | DSA-5226-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | pcs | 0.10.11-2ubuntu3+esm1 | USN-7614-1 |
| Ubuntu Pro 20.04 LTS | pcs | 0.10.4-3ubuntu0.1~esm1 | USN-7614-1 |
| Ubuntu Pro 16.04 LTS | pcs | 0.9.149-1ubuntu1.1+esm1 | USN-7614-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | pcs +1 | 0.11.1-10.el9_0.2 | RHSA-2022:6313 |
| RHEL 8 | pcs +1 | 0.10.12-6.el8_6.2 | RHSA-2022:6314 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.4 EUS | pcs +1 | 0.10.8-1.el8_4.2 | RHSA-2022:6312 |
| RHEL 8.2 EUS | pcs +1 | 0.10.4-6.el8_2.3 | RHSA-2022:6341 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | pcs +1 | 0.11.1-10.el9_0.2 | ALSA-2022:6313 |
| AlmaLinux 8 | pcs +1 | 0.10.12-6.el8_6.2.alma | ALSA-2022:6314 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | pcs | 0.11.1-10.el9_0.2 | RLSA-2022:6313 |
| Rocky Linux 8 | pcs | 0.10.12-6.el8_6.2 | RLSA-2022:6314 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | pcs +1 | 0.11.1-10.el9_0.2 | ELSA-2022-9753 |
| Oracle Linux 8 | pcs +1 | 0.10.12-6.0.1.el8_6.2 | ELSA-2022-9754 |
Advisories 13
- ALSA-2022:6313 Important: pcs security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2022:6314 Important: pcs security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2022:6341 Red Hat Security Advisory: pcs security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2022:6314 Red Hat Security Advisory: pcs security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2022:6313 Red Hat Security Advisory: pcs security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2022:6312 Red Hat Security Advisory: pcs security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-7614-1 pcs vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- DSA-5226-1 pcs - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2022:6313 Important: pcs security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2022:6314 Important: pcs security update Rocky Linux Security Advisories · Feb 5, 2026
- WID-SEC-2022-1255 Red Hat Enterprise Linux (pcs): Schwachstelle ermöglicht Privilegieneskalation BSI CERT-Bund (WID) · Jul 2, 2025
- ELSA-2022-9753 Important: pcs security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Sep 1, 2022
- ELSA-2022-9754 Important: pcs security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Sep 1, 2022