The Windows kernel in Windows 8.1 and RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, 1703 and 1709, Windows Server 2016 and Windows Server, version 1709 allows an elevation of privilege vulnerability due to the way objects are handled in memory, aka "Windows Elevation of Privilege Vulnerability".
https://www.exploit-db.com/exploits/43446/
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0744