The sandbox implementation in Google Chrome before 6.0.472.53 does not properly deserialize parameters, which has unspecified impact and remote attack vectors.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12133
http://googlechromereleases.blogspot.com/2010/09/stable-and-beta-channel-updates.html