https://cve.circl.lu/comments/feed 2025-09-30T15:50:53.363216+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent comments. https://cve.circl.lu/comment/4479dea7-72fb-4d91-90f4-95ffec3e0310 2025-09-30T15:50:53.368133+00:00 Alexandre Dulaunoy http://cve.circl.lu/user/adulau - [PoC Tested on AMD EPYC 7B13 64-Core Processor (Milan) and AMD Ryzen 9 7940HS w/ Radeon 780M Graphics (Phoenix).](https://github.com/google/security-research/tree/master/pocs/cpus/entrysign) 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. 2025-02-05T07:31:30.100378+00:00