Unspecified vulnerability in the Oracle VM VirtualBox component in Oracle Virtualization VirtualBox before 4.0.30, 4.1.38, 4.2.30, 4.3.26, and 5.0.0 allows local users to affect availability via unknown vectors related to Core.
http://www.securitytracker.com/id/1033880
http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html