Apple Processors Have A Speculation Vulnerability Too

Posted on 2022-04-29: https://www.prefetchers.info/

Known as “Augury”, this bug can “leak data (pointers) that are never read by any instruction, even speculatively” thanks to a “microarchitectural optimization” that is effectively speculation at a deeper level. I’m not fully sure what some of these words mean but I always find speculation bugs super fascinating; speed vs security tradeoff is an interesting space to explore.