This repository contains the source code of zdi-15-030 which exploits a double free vulnerability in win32k.sys and allows an attacker to gain SYSTEM privileges.
More can be read here: http://h30499.www3.hp.com/t5/HP-Security-Research-Blog/Just-another-day-at-the-office-A-ZDI-analyst-s-perspective-on/ba-p/6710637#.VQxDRxDUsrM