Description
An ACL bypass flaw was found in pacemaker. An attacker having a local account on the cluster and in the haclient group could use IPC communication with various daemons directly to perform certain tasks that they would be prevented by ACLs from doing if they went through the configuration.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | pacemaker | pacemaker 1.1.24-rc1, pacemaker 2.0.5-rc2 | — |
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 | 2.0.5~rc2-1 | — |
| Debian 13 | pacemaker | 2.0.5~rc2-1 | — |
| Debian 12 | pacemaker | 2.0.5~rc2-1 | — |
| Debian 10 | pacemaker | 2.0.1-5+deb10u1 | DSA-4791-1 |
| Debian 9 | pacemaker | 1.1.24-0+deb9u1 | DLA-2519-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | pacemaker | 2.0.3-3ubuntu4.1 | USN-4623-1 |
| Ubuntu 18.04 LTS | pacemaker | 1.1.18-0ubuntu1.3 | USN-4623-1 |
| Ubuntu 16.04 LTS | pacemaker | 1.1.14-2ubuntu1.9 | USN-4623-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | pacemaker +9 | 2.0.4-6.el8_3.1 | RHSA-2020:5487 |
| RHEL 7 | pacemaker +8 | 1.1.23-1.el7_9.1 | RHSA-2020:5453 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.2 EUS | pacemaker +9 | 2.0.3-5.el8_2.3 | RHSA-2020:5423 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | pacemaker +6 | 2.0.4-6.el8_3.1 | ALSA-2020:5487 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | pacemaker | 2.0.4+20200616.2deceaa3a-3.3.1 | SUSE-SU-2020:3054-1 |
| SLES 15 SP1 | pacemaker | 2.0.1+20190417.13d370ca9-3.15.1 | SUSE-SU-2020:3073-1 |
| SLES 15 | pacemaker | 1.1.18+20180430.b12c320f5-3.27.1 | SUSE-SU-2020:3080-1 |
| SLES 12 SP5 | pacemaker | 1.1.23+20200622.28dd98fad-3.9.2 | SUSE-SU-2020:3086-1 |
| SLES 12 SP4 | pacemaker | 1.1.19+20181105.ccd6b5b10-3.22.1 | SUSE-SU-2020:3089-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | pacemaker | 1.1.16-6.23.1 | SUSE-SU-2020:3094-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.2 | pacemaker | 2.0.4+20200616.2deceaa3a-lp152.2.3.1 | openSUSE-SU-2020:1782-1 |
| openSUSE Leap 15.1 | pacemaker | 2.0.1+20190417.13d370ca9-lp151.2.16.4 | openSUSE-SU-2020:1825-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | pacemaker +8 | 1.1.23-1.amzn2.1 | ALAS2-2021-1583 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | pacemaker-libs +2 | 2.0.4-6.el8_3.1 | ELSA-2020-5487 |
| Oracle Linux 7 | pacemaker +8 | 1.1.23-1.0.1.el7_9.1 | ELSA-2020-5453 |
Advisories 18
- ALSA-2020:5487 Moderate: pacemaker security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2020:5487 Red Hat Security Advisory: pacemaker security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2020:5423 Red Hat Security Advisory: pacemaker security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-4623-1 pacemaker vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4791-1 pacemaker - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2519-1 pacemaker - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2020:3054-1 Security update for pacemaker SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3086-1 Security update for pacemaker SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1782-1 Security update for pacemaker SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1825-1 Security update for pacemaker SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3073-1 Security update for pacemaker SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3094-1 Security update for pacemaker SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3089-1 Security update for pacemaker SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3080-1 Security update for pacemaker SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2020:5453 Red Hat Security Advisory: pacemaker security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- ELSA-2020-5453 Moderate: pacemaker security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 5, 2021
- ALAS2-2021-1583 Moderate: pacemaker security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jan 6, 2021
- ELSA-2020-5487 Moderate: pacemaker security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Dec 22, 2020