ALMOST UNFIXABLE “SINKCLOSE” BUG AFFECTS HUNDREDS OF MILLIONS OF AMD CHIPS

Summary from the TLDR InfoSec newsletter

Researchers have discovered a security flaw, dubbed Sinkclose, in AMD processors, affecting chips since 2006. The vulnerability allows hackers to run malicious code in the chip's privileged System Management Mode. While requiring initial access, Sinkclose enables deep-seated malware installation that can survive OS reinstallation and be extremely difficult to remove.