New Interrupt Injection Attack Bypasses Spectre v2 Defenses on Intel and AMD CPUs
Researchers from MIT CSAIL have discovered a new attack method called INTERRUPT INJECTION that can bypass Spectre v2 defenses on Intel and AMD CPUs. This technique allows an unprivileged Linux program to time a hardware interrupt to re-poison the branch predictor after it has been sanitized, potentially leading to data leakage. The attack was demonstrated on AMD Zen 2 machines, leaking kernel memory with high accuracy. AMD has issued a kernel patch to address the vulnerability, while Intel has not deemed a mitigation necessary. 
