We have a CPU mystery! We found a way to cause some processors to enter a glitch state where the normal rules don’t apply, but what does that mean…?
If you’re interested what can go wrong inside modern CPUs, read on!
It turns out that with precise scheduling, you can cause some processors to recover from a mispredicted vzeroupper incorrectly!
This technique is CVE-2023-20593 and it works on all Zen 2 class processors, which includes at least the following products
