Google V8, as used in Google Chrome before 12.0.742.112, performs an incorrect bounds check, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via unknown vectors.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14324
http://www.securitytracker.com/id?1025730
http://secunia.com/advisories/45097
http://googlechromereleases.blogspot.com/2011/06/stable-channel-update_28.html