CVE-2015-5189: Race condition in pcsd in PCS 0.9.139 and earlier uses a global variable to validate usernames, which allows r

Q: How do I fix CVE-2015-5189?

pacemaker\/corosync configuration system: upgrade to newer than 0.9.139. Exact commands for each OS are on this page.

Q: Is CVE-2015-5189 being exploited?

CVE-2015-5189 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2015-5189 affect?

CVE-2015-5189 affects pacemaker\/corosync configuration system. Severity is medium (CVSS 4.9). Race condition in pcsd in PCS 0.9.139 and earlier uses a global variable to validate usernames, which allows remote authenticated users to gain privileges by sending a command that is checked for security after another user is authenticated

Q: How urgent is CVE-2015-5189?

Priority 33/100. No elevated risk signals yet.

Routine

MEDIUM 4.9UPGRADE

CVE-2015-5189 is a medium-severity flaw (CVSS 4.9) affecting pacemaker\/corosync configuration system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Race condition in pcsd in PCS 0.9.139 and earlier uses a global variable to validate usernames, which allows remote authenticated users to gain privileges by sending a command that is checked for security after another user is authenticated.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.9 (Medium)
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-362
Published	2015-09-03
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: pacemaker\/corosync configuration system project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2015-09-03 14:59 UTCPublished CVE record published
2026-06-17 00:28 UTCUpdated Record last modified

pacemaker\/corosync configuration system project pacemaker\/corosync configuration system UPGRADE

Affected: <= 0.9.139

Fixed in: newer than 0.9.139

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pacemakercorosync-configuration-system || rpm -q pacemakercorosync-configuration-system || pacemakercorosync-configuration-system --version

2. UPGRADE to newer than 0.9.139 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pacemakercorosync-configuration-system

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pacemakercorosync-configuration-system

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2015-5189?

pacemaker\/corosync configuration system: upgrade to newer than 0.9.139. Exact commands for each OS are on this page.

Is CVE-2015-5189 being exploited?

CVE-2015-5189 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2015-5189 affect?

CVE-2015-5189 affects pacemaker\/corosync configuration system. Severity is medium (CVSS 4.9). Race condition in pcsd in PCS 0.9.139 and earlier uses a global variable to validate usernames, which allows remote authenticated users to gain privileges by sending a command that is checked for security after another user is authenticated

How urgent is CVE-2015-5189?

Priority 33/100. No elevated risk signals yet.

Related CVEs

CVE-2015-5190 HIGH 8.5 UPGRADE The pcsd web UI in PCS 0.9.139 and earlier allows remote authenticated users to execute arbitrary commands via

References

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