AMD's Zen 3 CPUs Are Susceptible to Spectre-Like Vulnerability

Re:AMD's Zen 3 CPUs Are Susceptible to Spectre-Like Vulnerab... by alanfranz on Sunday April 04, 2021 @07:46AM (#26688684)

Wasn’t a spectre paper published some days ago, and extensively discussed on hn?

All cpus can be affected by spectre. Including arm, mips, etc. Unless we totally disable speculative execution/branch prediction, which will impact performance. A lot.

EDIT: it wasn't a paper per-se, but the Google PoC: https://security.googleblog.com/2021/03/a-spectre-proof-of-c...

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Re:AMD's Zen 3 CPUs Are Susceptible to Spectre-Like Vulnerab... by mhh__ on Sunday April 04, 2021 @07:50AM (#26688706)

Spectre-like is the key thing here. They've introduced a new mechanism accessible presumably by a similar side channel (haven't read the paper yet)

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Re:AMD's Zen 3 CPUs Are Susceptible to Spectre-Like Vulnerab... by alanfranz on Sunday April 04, 2021 @07:52AM (#26688716)

Spectre is a class of bugs right now. The "classical" spectre relies on branch prediction, here we have another kind of prediction... but it's not that different, IMHO.

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