VP8 Codec SDK (libvpx) before 1.0.0 "Duclair" allows remote attackers to cause a denial of service (application crash) via (1) unspecified "corrupt input" or (2) by "starting decoding from a P-frame," which triggers an out-of-bounds read, related to "the clamping of motion vectors in SPLITMV blocks".
http://www.securityfocus.com/bid/51775
http://www.openwall.com/lists/oss-security/2012/01/30/2
http://www.openwall.com/lists/oss-security/2012/01/28/4
http://www.mandriva.com/security/advisories?name=MDVSA-2012:023
http://code.google.com/p/webm/source/browse/CHANGELOG?repo=libvpx
http://blog.webmproject.org/2012/01/vp8-codec-sdk-duclair-released.html