The kernel in Windows Server 2008 SP2 and R2 SP1, and Windows 7 SP1 allows locally authenticated attackers to gain privileges via a crafted application, or in Windows 7 for x64-based systems, cause denial of service, aka "Windows Kernel Elevation of Privilege Vulnerability."
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0244