Double free vulnerability in the Theora decoder in Google Chrome before 15.0.874.120 allows remote attackers to cause a denial of service or possibly have unspecified other impact via a crafted stream.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14484
http://www.mandriva.com/security/advisories?name=MDVSA-2012:076
http://www.mandriva.com/security/advisories?name=MDVSA-2012:075
http://www.debian.org/security/2012/dsa-2471
http://secunia.com/advisories/49089
http://secunia.com/advisories/46933
http://googlechromereleases.blogspot.com/2011/11/stable-channel-update.html