The PDF event handler in Google Chrome before 9.0.597.84 does not properly interact with print operations, which allows user-assisted remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via unknown vectors.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14530
http://googlechromereleases.blogspot.com/2011/02/stable-channel-update.html