Preface: Zen 2 is still utilized in industrial-grade embedded computers and edge applications where stability and power efficiency are required, often as a reliable legacy option.

Background: Because AMD-SB-7060 actually “does not” affect Zen 4 and Zen 5. Here’s a detailed explanation:

Scope of Affected AMD-SB-7060 (Zenbleed)

AMD’s official announcement (AMD-SB-7060) clearly states that this vulnerability (CVE-2023-20593) only affects Zen 2 architecture processors. This includes:

• Ryzen 3000 series desktop processors.

• Ryzen 4000 series mobile processors.

• EPYC “Rome” server processors.

Zenbleed (CVE-2023-20593) is a critical hardware vulnerability discovered in AMD’s Zen 2 processor architecture that allows unauthorized access to sensitive data. By exploiting a flaw in how the CPU handles speculative execution and register recovery, an attacker can potentially leak information—such as encryption keys or passwords—from other processes running on the same CPU.

Vulnerability details: Researchers reported a microarchitectural side channel via the AMD bug bounty program.

The researchers describe a microarchitectural timing side‑channel in AMD Ryzen™ processors resulting from contention in mishandling resources. By triggering secret‑dependent memory accesses during speculative execution and measuring timing differences after speculation is squashed, an attacker operating within the same process may be able to infer sensitive data.

Official announcement: Please refer to the link for details – https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7060.html