Transient execution CPU vulnerability

Transient execution CPU vulnerabilities are vulnerabilities in a computer system in which a speculative execution optimization implemented in a microprocessor is exploited to leak secret data to an unauthorized party. The archetype is Spectre, and transient execution attacks like Spectre belong to the cache-attack category, one of several categories of side-channel attacks. Since January 2018 many different cache-attack vulnerabilities have been identified.

Main articles: Downfall (security vulnerability), Foreshadow, Lazy FP state restore, Load value injection, Meltdown (security vulnerability), Microarchitectural Data Sampling, Retbleed, Spectre (security vulnerability), Speculative Store Bypass, and SWAPGS (security vulnerability)
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