PoC - AMD EPYC 7B13 64-Core Processor (Milan) and AMD Ryzen 9 7940HS w/ Radeon 780M Graphics (Phoenix).

Created on 2025-02-05 07:30, updated on 2025-02-05 07:31, by Alexandre Dulaunoy
JSON CVE-2024-56161
vulnerability:information=PoC

We've provided these PoCs to demonstrate that this vulnerability allows an adversary to produce arbitrary microcode patches. They cause the RDRAND instruction to always return the constant 4, but also set the carry flag (CF) to 0 to indicate that the returned value is invalid. Because correct use of the RDRAND instruction requires checking that CF is 1, this PoC can not be used to compromise correctly functioning confidential computing workloads. Additional tools and resources will be made public on March 5.

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