Project Zero has published a detailed writeup on this. It's worth noting (in the context of Intel's response) that the P0 post confirms that AMD and ARM CPUs ar

Project Zero has published a detailed writeup on this. It's worth noting (in the context of Intel's response) that the P0 post confirms that AMD and ARM CPUs are also affected: "Variants of this issue are known to affect many modern processors, including certain processors by Intel, AMD and ARM. For a few Intel and AMD CPU models, we have exploits that work against real software. We reported this issue to Intel, AMD and ARM on 2017-06-01" https://googleprojectzero.blogspot.com/2018/01/reading-privileged-memory-with-side.html https://googleprojectzero.blogspot.com/2018/01/reading-privi... Edit: Discussion https://news.ycombinator.com/item?id=16065845 https://news.ycombinator.com/item?id=16065845