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Ubuntu Security NoticesUSN-8987-1

USN-8987-1: libuser vulnerabilities

Severity not listed 2 CVEs Published Nov 3, 2026 at 5:36 PM UTC

Summary

It was discovered that libuser did not properly validate the GECOS field when changing user information. A local attacker could possibly use this issue to corrupt the passwd file, resulting in a denial of service. (CVE-2015-3245)

It was discovered that libuser modified the passwd file in place when updating user information. A local attacker could possibly use this issue to cause an inconsistent file state, resulting in a denial of service, or possibly escalate privileges. (CVE-2015-3246)

Products covered

A separate affected-products list was not included in the collected bulletin.

Remediation

Separate remediation guidance was not included in the collected bulletin.

CVEs in this advisory 2

Updates

  1. Published by Ubuntu

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.