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AMD Confirms Zen 5 Chips Hit by Critical Bug - but a Fix on the Way

AMD's Zen 5 CPUs have a flaw in RDSEED risking cryptographic key security, with fixes starting November 25 and full mitigation expected by January 2026.

Summary by ZDNet
Affecting a wide range of EPYC and Ryzen processors, the bug compromises a processor's pseudorandom number generator.

2 Articles

ZDNetZDNet
Center

AMD confirms Zen 5 chips hit by critical bug - but a fix on the way

Affecting a wide range of EPYC and Ryzen processors, the bug compromises a processor's pseudorandom number generator.

·United States
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Tech RadarTech Radar
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AMD confirms some Zen 5 CPUs have a worrying security flaw that could put users at risk

AMD finds a vulnerability in the RDSEED hardware-based random number generator.

·United Kingdom
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Tech Radar broke the news in United Kingdom on Tuesday, November 4, 2025.
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