Windows Kernel 64-bit pool memory disclosure in win32k!UMPDOBJ::LockSurface(CVE-2018-0813)

We have discovered that the win32k!UMPDOBJ::LockSurface function discloses portions of uninitialized pool memory to user-mode clients. The bug was encountered on Windows 7 64-bit; other versions were not tested. The leak was detected in the context of the splwow64.exe process, under the following...

Windows Kernel 64-bit stack memory disclosure in win32k!PROXYPORT::SendRequest(CVE-2018-0814)

We have discovered that the win32k!PROXYPORT::SendRequest function sends ALPC messages with portions of uninitialized memory from the local stack frame on Windows 7 64-bit other versions were not tested. The message is 0x20 bytes long, 8 of which are uninitialized. The layout of the memory area i...