sfnt/ttload.c in FreeType before 2.5.4 proceeds with offset+length calculations without restricting the values, which allows remote attackers to cause a denial of service (integer overflow and out-of-bounds read) or possibly have unspecified other impact via a crafted SFNT table.
http://advisories.mageia.org/MGASA-2015-0083.html
http://code.google.com/p/google-security-research/issues/detail?id=166
http://lists.fedoraproject.org/pipermail/package-announce/2015-February/150148.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-February/150162.html
http://lists.opensuse.org/opensuse-updates/2015-03/msg00091.html
http://rhn.redhat.com/errata/RHSA-2015-0696.html
http://www.debian.org/security/2015/dsa-3188
http://www.mandriva.com/security/advisories?name=MDVSA-2015:055
http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
http://www.securityfocus.com/bid/72986
http://www.ubuntu.com/usn/USN-2510-1