dxgkrnl.sys in the kernel-mode drivers in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, and Windows 7 SP1 allows local users to gain privileges via a crafted application, aka "DirectX Graphics Kernel Subsystem Double Fetch Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18924
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-081