CVE-2012-6656: Canonical Ubuntu Linux

Medium severity, CVSS 5.0. EPSS: 3.4% chance of exploitation in the next 30 days.

iconvdata/ibm930.c in GNU C Library (aka glibc) before 2.16 allows context-dependent attackers to cause a denial of service (out-of-bounds read) via a multibyte character value of "0xffff" to the iconv function when converting IBM930 encoded data to UTF-8.

Affected products

• Canonical Ubuntu Linux: version 10.04 only; version 12.04 only; version 14.04 only; version 14.10 only
• Debian Debian Linux: version 7.0 only
• GNU Glibc: up to and including 2.16

Published 2014-12-05. Last modified 2026-06-16.