Opera before 9.52 on Windows, Linux, FreeBSD, and Solaris, when processing custom shortcut and menu commands, can produce argument strings that contain uninitialized memory, which might allow user-assisted remote attackers to execute arbitrary code or conduct other attacks via vectors related to activation of a shortcut.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2008-4180
http://www.vupen.com/english/advisories/2008/2416
http://www.securitytracker.com/id?1020720
http://www.securityfocus.com/bid/30768
http://www.opera.com/support/search/view/894/
http://www.opera.com/docs/changelogs/windows/952/
http://www.opera.com/docs/changelogs/solaris/952/
http://www.opera.com/docs/changelogs/linux/952/
http://www.opera.com/docs/changelogs/freebsd/952/
http://www.openwall.com/lists/oss-security/2008/09/24/4
http://www.openwall.com/lists/oss-security/2008/09/19/2
http://secunia.com/advisories/32538