A Win32k information disclosure vulnerability exists in Microsoft Windows when the win32k component improperly provides kernel information. An attacker who successfully exploited the vulnerability could obtain information to further compromise the user's system, aka "Win32k Information Disclosure Vulnerability."
https://www.exploit-db.com/exploits/41879/
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0058