3 What Devices Do They Affect?
The Meltdown bug affects devices with Intel processors. Spectre is wide-ranging, and in theory, can be used as an exploit on basically any modern computer processor. But the risk doesn’t stop at Macs and PCs.
Apple has claimed that Meltdown can affect iOS and tvOS devices, too (though watchOS devices seem to be safe at this point).
If a computer uses a vulnerable processor and is running an unpatched version of an operating system, then it’s at risk. The threat can also affect cloud infrastructure and systems that use vulnerable processors and OS versions.
Safe to say, this bug affects millions of systems. Though, directly, either exploit won’t pose any more risk to users who practice safe computing than other serious viruses, Slate points out.