(Pwn2Own) Microsoft Windows win32kfull.sys Surface Object Use-After-Free Privilege Escalation Vulnerability

This vulnerability allows local attackers to execute arbitrary code on vulnerable installations of Microsoft Windows. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within how win32kfull.sys handles reference counting of Surface objects. An attacker can leverage this vulnerability to escalate privileges and execute code with kernel privileges.