Exactly, it's not a bug. The backdoor has been functioning perfectly for decades. : 3Intel's statement on the matter specifically says that the exploits are not caused by a "bug" or a "flaw" that is unique to Intel products. Intel also noted that the exploits can "gather sensitive data from computing devices that are operating as designed."
Is there some reason we don't believe that disabling branch prediction is going to plant a tremendous foot on the back of performance? I mean, the whole POINT of branch prediction IS increased performance, right? I think there are probably a LOT of little tidbits like this that are likely important, but are not getting the kind of publicity that some of these other stunts and statements are getting due to simply being overlooked.This new firmware disables branch prediction on AMD family 17h processor to mitigate a attack on the branch predictor that could lead to information disclosure from e.g. kernel memory (bsc#1068032 CVE-2017-5715).