NVIDIA Windows GPU Display Driver, DirectX 10 user-mode driver: A crafted pixel shader writes into unallocated memory

Impact

A crafted pixel shader writes into unallocated memory in the user-mode driver. Because shaders are attacker-authored content in any remote-rendering, VDI or cloud-gaming path, this is a code-execution primitive reachable from whatever feeds you shaders.

Who can reach it

Anyone who can submit a shader to the host - a tenant VM in a vGPU/vSGA setup, a remote desktop session, or a local user.

What to do

Install the fixed Windows GPU Display Driver branch listed in the NVIDIA bulletin. nvlddmkm.sys is a kernel driver: the swap needs a host reboot, so on a Windows GPU node this is a drain-and-reboot, not a live driver reload. No VBIOS or BMC flash involved.

References