AMD Zen Processor Vulnerabilities Discovered

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Google researchers uncover critical security flaw in all AMD Zen processors

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A significant vulnerability, known as EntrySign , has been uncovered by Google security researchers, affecting all AMD Zen processors from Zen 1 to Zen 4 .

The vulnerability stems from AMD 's use of AES -CMAC as a hash function in its signature verification process, which is a critical cryptographic error.

AMD has responded by issuing microcode updates that replace the compromised validation routine with a custom secure hash function.

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