Independent & educational platform Not a government body. No link or affiliation with any government organisation. Made for learning only. Test only systems you own or are authorised to test. Become a Partner or Sponsor → Full disclaimer

CVE-2015-3246

high CISA KEV

Red Hat Libuser Race Condition Vulnerability

Vendor / product: Red Hat — Libuser

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.

CVSS
7.4
7.4 (CVSS v3.1)
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity source: NVD CVSS v3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
Timeline (UTC)
Published: 2015-08-11 14:59
Modified: 2026-10-02 11:33
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-10-27 07:07 UTC
Exploitation
Listed in CISA KEV
Added 2026-08-26 · due 2026-09-09
Known ransomware use: Unknown

Required action (CISA)

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 products

redhat / enterprise_linux 5.0, 6.0, 7.0
opensuse / opensuse 13.2
libuser_project / libuser <0.56.13-8, ≥0.60 <0.60-7

Weakness classification (CWE)

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Vendor advisory: http://rhn.redhat.com/errata/RHSA-2015-1482.html
Vendor advisory: http://rhn.redhat.com/errata/RHSA-2015-1483.html
Vendor advisory: https://access.redhat.com/articles/1537873
Vendor advisory: http://rhn.redhat.com/errata/RHSA-2015-1482.html
Vendor advisory: http://rhn.redhat.com/errata/RHSA-2015-1483.html
Vendor advisory: https://access.redhat.com/articles/1537873
Patch / mitigation: https://access.redhat.com/articles/1537873
Patch / mitigation: https://access.redhat.com/articles/1537873

References

Data sources

CISA KEV — fetched 2026-10-27 06:50 UTC · record ↗
NVD CVE API 2.0 — fetched 2026-10-27 07:07 UTC · record ↗

Learn the basics

Understanding CVEs and CVSS Scores

Related CVEs