ZombieLoad is a serious flaw affecting almost every Intel chip since 2011. Apple, Amazon, Google, and Microsoft have issue patches for it.
The tech giant said in an advisory that any system running macOS Mojave 10.14.5, released Monday, is patched. This will prevent an attack from being run through Safari and other apps. Most users won’t experience any decline in performance. But some Macs could face up to a 40 percent performance hit for those who opt-in to the full set of mitigations.
Crazy that Intel chips have had this since 2011. This is the first time I’ve heard of ZombieLoad.