I don't seem to have bookmarked anything except for the link I posted earlier an...

I don't seem to have bookmarked anything except for the link I posted earlier and the HN thread that discussed this (posted below).

From my memory it was every zen module up to and including zen3.

It's possible that zen4 has been fixed but I'm not certain about that.

There is a "requirements" section of the PDF that talks a little bit more about which CPUs were effected but that isn't distilled!