Unspecified vulnerability in the Oracle VM VirtualBox component in Oracle Virtualization VirtualBox before 4.1.34, before 4.2.26, and before 4.3.14 allows local users to affect availability via vectors related to Graphics driver (WDDM) for Windows guests.
http://www.securitytracker.com/id/1031034
http://www.securityfocus.com/bid/70493
http://www.oracle.com/technetwork/topics/security/cpuoct2014-1972960.html