CVE-2015-3246
Red Hat Libuser Race Condition Vulnerability
IN CISA KEV
libuser before 0.56.13-8 and 0.60 before 0.60-7, as used in the userhelper program in the usermode package, directly modifies /etc/passwd, which allows local users to cause a denial of service (inconsistent file state) by causing an error during the modification. NOTE: this issue can be combined with CVE-2015-3245 to gain privileges.
- Vendor
- Red Hat
- Product
- Libuser
- CVSS 3.1
- 7.4 (high), scored by 134c704f-9b21-4f2e-91b3-4a467353bcc0CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 2015-08-11
- NVD modified
- 2026-10-02
- NVD status
- Analyzed
CISA KEV
- Date added
- 2026-08-26
- Due date
- 2026-09-09
- Ransomware use
- Unknown
- Required action
- 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.
EPSS
8.50% chance of exploitation in the next 30 days (percentile 94th)
FIRST EPSS, updated 17 Oct 2026. About EPSS
CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.
References
- lists.fedoraproject.org (Broken Link)
- lists.fedoraproject.org (Broken Link)
- lists.opensuse.org (Mailing List, Third Party Advisory)
- rhn.redhat.com (Vendor Advisory)
- rhn.redhat.com (Vendor Advisory)
- www.securityfocus.com (Third Party Advisory)
- www.securitytracker.com (Third Party Advisory)
- access.redhat.com (Mitigation, Vendor Advisory)
- www.exploit-db.com (Third Party Advisory, VDB Entry)
- lists.fedoraproject.org (Broken Link)
- lists.fedoraproject.org (Broken Link)
- lists.opensuse.org (Mailing List, Third Party Advisory)
Data last updated 18 Oct 2026. Sources: NVD API 2.0, CISA KEV catalog, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.