The code that drives the decoder is the CPU’s microcode, and it lives in ROM that’s normally inaccessible. But microcode patches have been deployed in the past to fix up CPU hardware bugs ...

A team of Google researchers working with AMD recently discovered a major CPU exploit on Zen-based processors. The exploit ...

[Can Bölük] has a novel solution: By speculatively executing the target instruction and then monitoring the microcode sequencer, he can determine if the CPU is decoding an instruction even if it ...

In a nutshell: Google researchers recently disclosed a stealthy security flaw dubbed "EntrySign" that allowed malicious code execution through unsigned microcode patches on AMD processors from Zen ...

This vulnerability may allow an attacker with system administrative privilege to load malicious CPU microcode patches. In the report, the researchers describe how they were able to load patches ...

These random test generators create microcode test sequences ... We see that the call with the greatest overall impact on CPU time is in the op_gen.sv file at line 4308. This call executes quickly; ...