CTS Labs, a heretofore unknown Tel Aviv-based cybersecurity startup, has claimed it's found over a dozen security problems with AMD Ryzen and EPYC processors. Linus Torvalds, Linux's creator, doesnt buy it.
Torvalds, in a Google+ discussion, wrote:
"When was the last time you saw a security advisory that was basically 'if you replace the BIOS or the CPU microcode with an evil version, you might have a security problem?' Yeah."
Or, as a commenter put it on the same thread, "I just found a flaw in all of the hardware space. No device is secure: if you have physical access to a device, you can just pick it up and walk away. Am I a security expert yet?"