Multiple integer overflows in malloc/malloc.c in the GNU C Library (aka glibc or libc6) 2.18 and earlier allow context-dependent attackers to cause a denial of service (heap corruption) via a large value to the (1) pvalloc, (2) valloc, (3) posix_memalign, (4) memalign, or (5) aligned_alloc functions.
https://sourceware.org/bugzilla/show_bug.cgi?id=15856
https://security.gentoo.org/glsa/201503-04
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2013-4332
http://www.ubuntu.com/usn/USN-1991-1
http://www.securityfocus.com/bid/62324
http://www.openwall.com/lists/oss-security/2013/09/12/6
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