Integer overflow in string/strcoll_l.c in the GNU C Library (aka glibc or libc6) 2.17 and earlier allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code via a long string, which triggers a heap-based buffer overflow.
https://security.gentoo.org/glsa/201503-04
https://seclists.org/bugtraq/2019/Jun/14
https://bugzilla.redhat.com/show_bug.cgi?id=855385
http://www.ubuntu.com/usn/USN-1991-1
http://www.openwall.com/lists/oss-security/2012/09/07/9
http://www.mandriva.com/security/advisories?name=MDVSA-2013:284
http://www.mandriva.com/security/advisories?name=MDVSA-2013:283
http://secunia.com/advisories/55113