https://arstechnica.com/gadgets/2018/05/new-speculative-execution-vulnerability-strikes-amd-arm-and-intel/

A new attack that uses processors' speculative-execution capabilities to leak data, named Speculative Store Bypass (SSB), has been published after being independently discovered by Microsoft's Security Response Center and Google Project Zero. Processors from Intel and AMD, along with some of those using ARM's designs, are all affected.