CVE-2014-6040: GNU Glibc

Medium severity, CVSS 5.0. EPSS: 6.6% chance of exploitation in the next 30 days.

GNU C Library (aka glibc) before 2.20 allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via a multibyte character value of "0xffff" to the iconv function when converting (1) IBM933, (2) IBM935, (3) IBM937, (4) IBM939, or (5) IBM1364 encoded data to UTF-8.

Affected products

• GNU Glibc: up to and including 2.19; version 2.0 only; version 2.0.1 only; version 2.0.2 only; version 2.0.3 only; version 2.0.4 only; …

Published 2014-12-05. Last modified 2026-06-17.