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GoFetch plaguesAppleM-series andIntelRaptor Lake CPUs, and could result in the theft of sensitive information.
It is described as a side-channel attack that leans on the performance-enhancing prediction features many modern silicons carry.
In that respect, its similar to previously disclosed vulnerabilities such as Spectre or Meltdown.
That way, when the data is needed, its already present and thus results in faster performance.
But this data can be leaked, and fixing the issue might mean a decrease in performance.
The bad news is that this problem cannot be solved on the M1 and M2.
“We observe that the DIT bit set on M3 CPUs effectively disables the DMP.
This is not the case for the M1 and M2,” the researchers explained.
The silver lining here is that there is a workaround.
AsThe Registerexplained in its writeup, Apples M-series chips have two types of cores: Firestorm and Icestorm.
However, Icestorm is smaller and slower than Firestorm, so the performance will still take a hit.
Security wont however, and that should be the whole point.
