Windows Kernel 64-bit stack memory disclosure in win32k!SfnINLPHELPINFOSTRUCT (via user-mode callback)(CVE-2018-0810)

We have discovered that a user-mode callback invoked by the win32k!SfnINLPHELPINFOSTRUCT function via KeUserModeCallback leads to the disclosure of uninitialized stack memory to user-mode clients, due to compiler-introduced structure padding. The vulnerability affects Windows 7 64-bit; other...