Meltdown and Spectre: what you need to know

UPDATE (as of 1/12/18): Several vendors have produced patches for Meltdown and Spectre, however performance problems dog the fixes. Details on the patches were published here.

UPDATE (as of 1/04/18): Since the Malwarebytes Database Update 1.0.3624, all Malwarebytes users are able to receive the Microsoft patch to mitigate Meltdown.