Use-after-free vulnerability in Apple Safari before 5.0 on Mac OS X 10.5 through 10.6 and Windows, and before 4.1 on Mac OS X 10.4, allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted PDF document.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7199
http://www.vupen.com/english/advisories/2010/1373
http://www.securityfocus.com/bid/40620
http://support.apple.com/kb/HT4196
http://securitytracker.com/id?1024067
http://secunia.com/advisories/40105
http://lists.apple.com/archives/security-announce/2010/Jun/msg00000.html