The kernel-mode drivers in Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, 1703, and Windows Server 2016 allow local users to gain privileges via a crafted application, aka "Win32k Elevation of Privilege Vulnerability."
https://xiaodaozhi.com/exploit/117.html
https://www.exploit-db.com/exploits/44478/
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0263