AMD has been hit with significantly fewer vulnerability reports than Intel, but a handful have still surfaced. In this case, regarding the Take A Way whitepaper, AMD is claiming that “these are not new speculation-based attacks” and have not released any software updates in response.
From our position, it’s unclear whether AMD or the researchers are correct until either AMD releases a patch, or someone releases an in-the-wild exploit. Either way, the researchers also state that the amount of data that can be exfiltrated is small. While they claim that it can work in real-world scenarios, that doesn’t mean that it will be worth doing in real-world scenarios.
Still, if it works and it can be patched, then it should be fixed.