Wow, we (+@h0t_max and @_Dmit) have found two undocumented x86 instructions in Intel CPUs which completely control microarchitectural state (yes, they can modify microcode) pic.twitter.com/IDBkD1ZIkI
— Mark Ermolov (@_markel___) March 19, 2021
from Hacker News https://twitter.com/_markel___/status/1373059797155778562
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