Woops, sorry, I was actually thinking of the SYSRET vulnerability (CVE-2012-0217) which was a mismatch between Intel and the written spec[0]. POPSS did also hav

Woops, sorry, I was actually thinking of the SYSRET vulnerability (CVE-2012-0217) which was a mismatch between Intel and the written spec[0]. POPSS did also have differences between Intel and AMD implementations but both were vulnerable in different ways. 0: https://xenproject.org/2012/06/13/the-intel-sysret-privilege-escalation/ https://xenproject.org/2012/06/13/the-intel-sysret-privilege...