AMD have released an microcode update for affected processors. Your BIOS or Operating System vendor may already have an update available that includes it.
I don’t really understand how CPU microcode updates work. If I’m keeping Ubuntu up to date, will this just happen automatically?
Sort of weirds me out that my OS can just silently update my CPU - I didn’t realize I was giving it that level of control… I guess it’s good vs the alternative of no-one actually updating for exploits like his though.
The implication was that you could boot a malicious OS, then boot into a different OS with the same processor and get pwned. As other commenters mentioned, this mechanism doesn't create that risk because the update has to be applied each boot.
I don’t really understand how CPU microcode updates work. If I’m keeping Ubuntu up to date, will this just happen automatically?