Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 on Linux make cairo _cairo_surface_get_extents calls that do not properly interact with libav header allocation in FFmpeg 0.10, which allows remote attackers to cause a denial of service (application crash) via a crafted video.
https://security.gentoo.org/glsa/201701-15
https://bugzilla.mozilla.org/show_bug.cgi?id=1275339
http://www.ubuntu.com/usn/USN-3044-1
http://www.securitytracker.com/id/1036508
http://www.securityfocus.com/bid/92261
http://www.mozilla.org/security/announce/2016/mfsa2016-65.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00029.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00004.html