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://exchange.xforce.ibmcloud.com/vulnerabilities/44552
http://www.openwall.com/lists/oss-security/2008/09/24/4
http://www.openwall.com/lists/oss-security/2008/09/19/2