Apparently, there's a new speculative execution exploit in town on Intel CPUs: SWAPGS. It takes research on Meltdown and Spectre to the next level and targets the root of the CPU.
This is not the first SE exploit, and probably won't be the last. But how does this one manage to evade all the patches developed for the other recent exploits? Or, put more simply, how is this one different? They patched the previous ones after all. Just because it's a different instruction, it works again?
Obligatory XKCD: #1938 Meltdown and Spectre
Please keep the answers (relatively) simple.