Integer signedness error in Opera before 8.54 allows remote attackers to execute arbitrary code via long values in a stylesheet attribute, which pass a length check. NOTE: a sign extension problem makes the attack easier with shorter strings.
https://exchange.xforce.ibmcloud.com/vulnerabilities/25829
http://www.vupen.com/english/advisories/2006/1354
http://www.securityfocus.com/archive/1/430876/100/0/threaded
http://www.opera.com/docs/changelogs/windows/854/
http://security.gentoo.org/glsa/glsa-200606-01.xml
http://secunia.com/advisories/20117
http://marc.info/?l=full-disclosure&m=114493114031891&w=2
http://lists.suse.com/archive/suse-security-announce/2006-May/0004.html