Improper
Access Control in the AMD SPI protection feature may allow a user with Ring0
(kernel mode) privileged access to bypass protections potentially resulting in
loss of integrity and availability.
A bug in AMD CPU’s core logic may allow for an attacker, using specific code from an unprivileged VM, to trigger a CPU core hang resulting in a potential denial of service. AMD believes the specific code includes a specific x86 instruction sequence that would not be generated by compilers.