Kernel software installed and running inside a Guest/Host VM may post improper commands to the GPU Firmware to trigger a write of data outside the intended GPU memory.
A logic error in the address translation allowed a compromised Host (Kernel) to perform arbitrary writes to firmware memory.
Exploitability
AV:AAC:LPR:NUI:NScope
S:UImpact
C:NI:LA:N4.3/CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NOther