The NVIDIA display driver R352 before 353.82 and R340 before 341.81 on Windows; R304 before 304.128, R340 before 340.93, and R352 before 352.41 on Linux; and R352 before 352.46 on GRID vGPU and vSGA allows local users to write to an arbitrary kernel memory location and consequently gain privileges via a crafted ioctl call.
https://support.lenovo.com/us/en/product_security/len_3313
https://h20566.www2.hp.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04815468
https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04815468
http://www.ubuntu.com/usn/USN-2747-1