Critical vulnerability in AMD Zen 5 CPUs could make encryption keys predictable

A critical vulnerability has been identified in AMD's Zen 5 CPUs, specifically impacting the RDSEED instruction, which is responsible for generating random numbers used in encryption processes. This flaw, designated as AMD-SB-7055 and tracked under CVE-2025-62626, carries a high severity rating due to its potential to make encryption keys predictable. The predictability of these keys poses significant security risks, as it could undermine the confidentiality and integrity of encrypted data. The vulnerability highlights concerns about the robustness of hardware-based random number generation in these processors. Given the central role of encryption keys in securing digital communications and data, this issue demands urgent attention from both AMD and users relying on Zen 5 CPUs for secure operations. While details on mitigation or patches have not been provided, the discovery underscores the ongoing challenges in ensuring hardware security in modern computing environments.