The PDF implementation in Google Chrome before 13.0.782.215 on Linux does not properly use the memset library function, 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%3A14371
http://googlechromereleases.blogspot.com/2011/08/stable-channel-update_22.html