Use-after-free vulnerability in the PDF functionality in Google Chrome before 19.0.1084.52 allows remote attackers to cause a denial of service or possibly have unspecified other impact via an invalid encrypted document.
http://code.google.com/p/chromium/issues/detail?id=127331
http://googlechromereleases.blogspot.com/2012/05/stable-channel-update_23.html
http://secunia.com/advisories/49277
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15076