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

> CVE-2015-3246: Red Hat Libuser Race Condition Vulnerability. CVSS 7.4 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2015-3246
Last updated: 2026-10-02T11:33:29Z

- Published: 2015-08-11 14:00 UTC · Updated: 2026-10-02 11:33 UTC · Assigner: redhat
- CVSS: 7.4 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 8.5%, 95th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2026-08-26, federal due date 2026-09-09, ransomware use: Unknown

## Description

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.

## CISA 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.

## Affected vendors and products

- Red Hat: Libuser

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2015-3246)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2015-3246)
- [http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163044.html](http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163044.html)
- [http://lists.fedoraproject.org/pipermail/package-announce/2015-July/162947.html](http://lists.fedoraproject.org/pipermail/package-announce/2015-July/162947.html)
- [http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00000.html](http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00000.html)
- [http://rhn.redhat.com/errata/RHSA-2015-1482.html](http://rhn.redhat.com/errata/RHSA-2015-1482.html)
- [http://rhn.redhat.com/errata/RHSA-2015-1483.html](http://rhn.redhat.com/errata/RHSA-2015-1483.html)
- [https://access.redhat.com/articles/1537873](https://access.redhat.com/articles/1537873)
- [https://www.exploit-db.com/exploits/44633/](https://www.exploit-db.com/exploits/44633/)
- [https://www.qualys.com/2015/07/23/cve-2015-3245-cve-2015-3246/cve-2015-3245-cve-2015-3246.txt](https://www.qualys.com/2015/07/23/cve-2015-3245-cve-2015-3246/cve-2015-3245-cve-2015-3246.txt)
- [http://www.securityfocus.com/bid/76022](http://www.securityfocus.com/bid/76022)
- [http://www.securitytracker.com/id/1033040](http://www.securitytracker.com/id/1033040)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2015-3246 · Markdown: https://rewindex.com/cve/CVE-2015-3246.md · JSON: https://rewindex.com/api/v1/cves/CVE-2015-3246 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:49:22.441Z