[betterunix2]

"The AMD microarchitecture does not allow memory references, including speculative references, that access higher privileged data when running in a lesser privileged mode when that access would result in a page fault."

Sounds like AMD's chips are not affected by variants of this attack either. Sure, we should wait for the details to be published before making sweeping claims, but the details we have so far paint a reasonable picture of what the vulnerability involves. It is reasonable to assume that AMD's design decisions prevent this attack, while Intel's decisions enable it.