The kernel-mode drivers in Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1 and Windows Server 2012 Gold allow a local authenticated attacker to execute a specially crafted application to obtain kernel information, aka "Win32k Information Disclosure Vulnerability."
https://www.exploit-db.com/exploits/42008/
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0245