A new variant (v2) of the data-leaking side-channel vulnerability also affects the most recent Intel CPUs, including the latest Cascade Lake, which are otherwise resistant against attacks like Meltdown Foreshadow and other MDS variants (RIDL and Fallout) The vulnerability resides in Intel’s Transactional Synchronization Extensions (TSX) Intel TSX provides transactional memory support in hardware to improve the performance of the CPU by speeding up the execution of multi-threaded software and aborting a transaction.
Source: https://thehackernews.com/2019/11/zombieload-cpu-vulnerability.html