Speculative Execution脆弱性。Spectre v1/v2/v4・Meltdown (Intel only・KPTI)・MDS (RIDL/Fallout/ZombieLoad)・L1TF・MMIO Stale Data・LVI Load Value Injection・Retbleed (BHI)・Zenbleed AMD Zen 2・INCEPTION/SQUIP・Downfall (Gather/AVX2)・Reptar (Intel)・GoFetch (Apple Silicon DMP)・KASLR Bypass・SLS Mitigation・Retpoline、2026年Hardware Mitigation主流化。