Before we get into the more technical stuff, we should stress that this is not the end of the world
because, first, you need malware running on, or a malicious user logged into, your system to exploit
it. Second, no one right now is leveraging the weaknesses in the wild. There are easier ways for
hackers to extract data from a computer or other device, via security bugs in browsers, PDF
readers, email clients, and so on.

And, third, exploiting this TLB side channel is non trivial.

However, if you are worried about cache-based attacks – such as, if you're running a virtual machine
on a public cloud platform, and fear neighboring guests are trying to snoop on you – then you should
be paying attention.