WebKit in Apple Mac OS X 10.3.x through 10.3.9 and 10.4 through 10.4.8 allows remote attackers to execute arbitrary code via a crafted HTML file, which accesses previously deallocated objects.
https://exchange.xforce.ibmcloud.com/vulnerabilities/30645
http://www.vupen.com/english/advisories/2006/4750
http://www.us-cert.gov/cas/techalerts/TA06-333A.html
http://www.securityfocus.com/bid/21335
http://www.kb.cert.org/vuls/id/848960
http://securitytracker.com/id?1017304
http://secunia.com/advisories/23155
http://lists.apple.com/archives/security-announce/2006/Nov/msg00001.html