Google Chrome before 15.0.874.120 does not properly perform VP8 decoding, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted stream.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14166
http://secunia.com/advisories/46933
http://googlechromereleases.blogspot.com/2011/11/stable-channel-update.html