For the NVIDIA Quadro, NVS, GeForce, and Tesla products, NVIDIA GPU Display Driver contains a vulnerability in the kernel mode layer (nvlddmkm.sys for Windows or nvidia.ko for Linux) handler where a missing permissions check may allow users to gain access to arbitrary physical memory, leading to an escalation of privileges.
https://support.lenovo.com/us/en/solutions/LEN-10822
http://www.securityfocus.com/bid/94177