VMware Tools in VMware Workstation 10.x before 10.0.2, VMware Player 6.x before 6.0.2, VMware Fusion 6.x before 6.0.3, and VMware ESXi 5.0 through 5.5, when a Windows 8.1 guest OS is used, allows guest OS users to gain guest OS privileges or cause a denial of service (kernel NULL pointer dereference and guest OS crash) via unspecified vectors.
http://www.vmware.com/security/advisories/VMSA-2014-0005.html
http://www.securitytracker.com/id/1030311
http://www.securitytracker.com/id/1030310
http://www.securityfocus.com/archive/1/532236/100/0/threaded
http://secunia.com/advisories/58894
http://packetstormsecurity.com/files/126869/VMware-Security-Advisory-2014-0005.html