Integer signedness error in the Mac_Read_POST_Resource function in base/ftobjs.c in FreeType before 2.5.4 allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via a crafted Mac font.
http://advisories.mageia.org/MGASA-2015-0083.html
http://code.google.com/p/google-security-research/issues/detail?id=154
http://lists.opensuse.org/opensuse-updates/2015-03/msg00091.html
http://rhn.redhat.com/errata/RHSA-2015-0696.html
https://security.gentoo.org/glsa/201503-05
http://www.debian.org/security/2015/dsa-3188
http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html