CVE-2011-1089: GNU Glibc

Low severity, CVSS 3.3. EPSS: 0.4% chance of exploitation in the next 30 days.

The addmntent function in the GNU C Library (aka glibc or libc6) 2.13 and earlier does not report an error status for failed attempts to write to the /etc/mtab file, which makes it easier for local users to trigger corruption of this file, as demonstrated by writes from a process with a small RLIMIT_FSIZE value, a different vulnerability than CVE-2010-0296.

Affected products

• GNU Glibc: up to and including 2.13; version 1.00 only; version 1.01 only; version 1.02 only; version 1.03 only; version 1.04 only; …

Published 2011-04-10. Last modified 2026-06-16.