A compromised Trusted OS (TOS) driver could issue a malformed call that could potentially allow memory access outside the intended range resulting in loss of integrity.
Exploitability
AV:LAC:HAT:NPR:HUI:NVulnerable System
VC:LVI:LVA:NSubsequent System
SC:NSI:NSA:N1.8/CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:NOther