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AMD Zen 1 Vulnerability Not Properly Fixed, Second Pass Issued

August 14, 2023


It seems that AMD’s issued patch for its Zen 1 “Division by zero” bug wasn’t the end-all, be-all the company wanted it to be. While the company was fast in issuing a patch, there’s now the suspicion that they might’ve been just a bit too fast: according to Michael Larabel with Phoronix, AMD Linux Engineer Borislav Petkov published a new patch that fixed an issue with the original solution (also published by him). It’s just another datapoint on the difficulties of hardening against possible attack vectors.

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