It is suspected that the flaw is in the way an Intel CPU manages memory between kernel mode and user mode It is up to operating system manufacturers to fix the problem and the fix will hurt performance. Details of the security vulnerability are under embargo from Intel in an attempt to give developers time to come up with a fix. There are rumors that Microsoft and Amazon Web Services customers have been notified of impending maintenance patches for this month which might be associated with this bug.”]
Source: https://securityaffairs.co/wordpress/67372/hacking/intel-cpu-design-mistake.html