Opera before 9.23 allows remote attackers to execute arbitrary code via crafted Javascript that triggers a "virtual function call on an invalid pointer."
https://exchange.xforce.ibmcloud.com/vulnerabilities/36039
http://security.gentoo.org/glsa/glsa-200708-17.xml
http://lists.opensuse.org/opensuse-security-announce/2007-08/msg00006.html
https://euvd.enisa.europa.eu/vulnerability/EUVD-2007-4350
http://www.vupen.com/english/advisories/2007/2904
http://www.securitytracker.com/id?1018572
http://www.securityfocus.com/bid/25331
http://www.opera.com/support/search/view/865/
http://secunia.com/advisories/26635