Graphics in Microsoft Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, 1703, and Windows Server 2016 allows an elevation of privilege vulnerability due to the way it handles objects in memory, aka "Win32k Elevation of Privilege Vulnerability".
https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8467