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Encryption-breaking, password-leaking bug in many AMD CPUs could take months to fix
(arstechnica.com)
This is a most excellent place for technology news and articles.
The more steps in the instruction pipeline the more ways there are for there to be an error where some result doesn't get erased when undoing stuff from the wrong branch. It's basically like telling someone to move into a new house and get settled then stopping them six hours in and trying to make sure you get all their stuff out.