Thanks Intel!

Free privilege escalation, along with data snooping courtesy of Intel Rabbis & Cudder for all Intel processors ever made.

https://lkml.org/lkml/2017/12/27/2
https://www.theregister.co.uk/2018/01/02/intel_cpu_design_flaw/

Perhaps privilege levels are a bad security model by themself? Time and time again "privilege escalation" turns out to be easy to accomplish and hard to mitigate.

>>16
what alternative do you propose?