Opera Web Browser Multiple Malformed HTML Parsing Denial Of Service Vulnerabilities
The Opera Web browser is prone to multiple vulnerabilities that may result in a browser crash. These issues are exposed when the browser attempts to parse certain malformed HTML content. It is conjectured that this will only result in a denial of service and is not further exploitable to execute arbitrary code, though this has not been confirmed.
http://www.securityfocus.com/bid/15124/info
http://www.securityfocus.com/bid/15124/discuss