This is the most “widespread” security issue affecting virtually all PC’s for past 10-15 years. To date, no known infections – – but the potential is there.
ALL# cpu architectures have a degree of vulnerability (even phones).
# But it’s been reported that Raspberry Pi PC’s are immune from these flaws!
Initial patch target date is: Tuesday January 9, 2018 (for all major OS’s).
More detailed explanation about the issue – what it is and why Intel is most affected (different design, faster processing of page calls).
Another good article link below:
Here’s a more complete (technical) explanation: