CVE-2012-3404: Canonical Ubuntu Linux

Medium severity, CVSS 5.0. EPSS: 2.2% chance of exploitation in the next 30 days.

The vfprintf function in stdio-common/vfprintf.c in libc in GNU C Library (aka glibc) 2.12 and other versions does not properly calculate a buffer length, which allows context-dependent attackers to bypass the FORTIFY_SOURCE format-string protection mechanism and cause a denial of service (stack corruption and crash) via a format string that uses positional parameters and many format specifiers.

Affected products

• Canonical Ubuntu Linux: version 8.04 only; version 10.04 only; version 11.04 only; version 11.10 only; version 12.04 only
• GNU Glibc: version 2.12 only
• Red Hat Enterprise Linux: version 6.0 only
• Red Hat Enterprise Virtualization: version 3.0 only

Published 2014-02-10. Last modified 2026-06-16.