Millions of AMD CPUs found vulnerable to 18-year-old 'Sinkclose' deep-system flaw but it's pretty difficult to exploit
Security researchers have discovered a vulnerability that affects almost all AMD CPUs, allowing access to some of the deepest parts of the chip. Named 'Sinkclose', the flaw allows attackers that already have kernel-level access to modify SMM (System Management Mode) settings even with existing protections enabled.