The GIF decoder in QtGui in Qt before 5.3 allows remote attackers to cause a denial of service (NULL pointer dereference) via invalid width and height values in a GIF image.Per: http://cwe.mitre.org/data/definitions/476.html CWE-476: NULL Pointer Dereference http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-0190