dxgkrnl.sys (aka the DirectX graphics kernel subsystem) in the kernel-mode drivers in Microsoft Windows Vista SP2, 
Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows Server 2012, and Windows RT does not properly handle objects in memory, 
which allows local users to gain privileges via a crafted application, aka "DirectX Graphics Kernel Subsystem Double Fetch Vulnerability."

c:\> epathobj_exp32(MS13-046).exe cmd