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SLAM: Spectre based on Linear Address Masking #478

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taggart opened this issue Dec 6, 2023 · 0 comments

taggart commented Dec 6, 2023

This one is sort of weird, it's a vulnerability that researchers have found in features planned for future CPU designs (but also some existing).

According to the list on the SLAM page:

Future Intel CPUs supporting LAM (both 4- and 5-level paging);
Future AMD CPUs supporting UAI and 5-level paging;
Future Arm CPUs supporting TBI and 5-level paging.
but also
Existing AMD CPUs vulnerable to CVE-2020-12965;

Intel/AMD/ARM have been advised and linux patches are being developed to disable these CPU features until more is known.

But accoding to the above the existing AMD Zen+ and Zen2 may be vulnerable, so SMC should probably report that for those cpus.

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