Comment on New ZenHammer memory attack impacts AMD Zen CPUs
Jesus_666@feddit.de 3 months ago
Note that as per the paper DDR5 is a lot harder to attack than DDR4 so newer systems should be less vulnerable (but not entirely immune).
Comment on New ZenHammer memory attack impacts AMD Zen CPUs
Jesus_666@feddit.de 3 months ago
Note that as per the paper DDR5 is a lot harder to attack than DDR4 so newer systems should be less vulnerable (but not entirely immune).
Tobberone@lemm.ee 3 months ago
And unlike the rowhammer report which came a few years ago, neither AM4 nor AM5 is reported at 100% success rate, which asks the question why? What made those specific systems vulnerable?
Jesus_666@feddit.de 3 months ago
It might just come down to timing issues. They did mention that one reason DDR5 is so hard to attack is that the time window for flipping a bit is impractically short.