M1 enforces W^X through SPRR, which does not involve the kernel. | Hacker News

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		saagarjha on May 26, 2021 \| parent \| context \| favorite \| on: M1racles: An Apple M1 covert channel vulnerability M1 enforces W^X through SPRR, which does not involve the kernel.

johncolanduoni on May 26, 2021 [–]

It does when running native ARM code (but not x86 code), but AFAIK nothing stops Apple from changing this to being kernel mediated by updating libSystem in the ARM case as well. Of course I doubt they would take the performance hit just to get rid of a this issue.

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