Hacker News new | comments | show | ask | jobs | submit login X86 rootkit (github.com) 230 points by jsprogrammer 17 hours ago | 40 comments vardump 14 hours ago Read through it all. Seems legit so far. This is bad . Exploiting non-vulnerable SMM code through a remap flaw in x86 architecture. Ouch. Not only can this arbitrarily exploit the running OS. It might actually be able to physically destroy the computer it's running on, for example by abusing thermal controls. Doesn't affect Sandy bridge or newer. reply userbinator 3 hours ago The severity of this depends on whether you consider SMM the same privilege level as ring 0, or higher. From my understanding, SMM seems like it was never really designed to be a higher privilege level with strong isolation guarantees. reply bonzini 1 hour ago It was not designed as one, but it was muta...