CVE-2015-3246: Red Hat Libuser Race Condition Vulnerability

Required action (CISA's text)

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Description (NVD)

Red Hat libuser contains a race condition vulnerability that allows authenticated local users to corrupt the /etc/passwd file to cause a denial of service or privilege escalation.

SOURCES

• CISA KEVCISA Known Exploited Vulnerabilities catalog

Other Red Hat flaws

• CVE-2015-5287: Red Hat Automatic Bug Reporting Tool Privilege Escalation Vulnerability
• CVE-2018-14667: Red Hat JBoss RichFaces Framework Expression Language Injection Vulnerability
• CVE-2021-3560: Red Hat Polkit Incorrect Authorization Vulnerability
• CVE-2021-4034: Red Hat Polkit Out-of-Bounds Read and Write Vulnerability
• CVE-2010-1428: Red Hat JBoss Information Disclosure Vulnerability

Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.