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.
https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Ba=commitdiff%3Bh=41488498b6
https://security.gentoo.org/glsa/201602-02
http://www.securityfocus.com/bid/69472
http://www.openwall.com/lists/oss-security/2014/08/29/3
http://www.mandriva.com/security/advisories?name=MDVSA-2014:175
http://www.debian.org/security/2015/dsa-3142
http://ubuntu.com/usn/usn-2432-1
http://secunia.com/advisories/62146