CoreGraphics in Apple Mac OS X before 10.5.3 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted PDF document, related to an uninitialized variable.
http://lists.apple.com/archives/security-announce/2008//May/msg00001.html
http://secunia.com/advisories/30430
http://securitytracker.com/id?1020136
https://exchange.xforce.ibmcloud.com/vulnerabilities/42710