# DSA-5459-1: amd64-microcode security update

DSA-5459-1, released July 25, 2023, fixes 1 CVE in amd64-microcode. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/dsa-5459-1
- Platform: Linux
- Released: Jul 25, 2023
- Priority: High (Closes CVE-2023-20593, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://security-tracker.debian.org/tracker/CVE-2023-20593

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [amd64-microcode](https://patchblox.com/security/data/product/linux/amd64-microcode.md) | Debian 11.6 (bullseye) | 3.20230719.1~deb11u1 |
| [amd64-microcode](https://patchblox.com/security/data/product/linux/amd64-microcode.md) | Debian 12.15 (bookworm) | 3.20230719.1~deb12u1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2023-20593](https://patchblox.com/security/data/cve/CVE-2023-20593.md) | High | amd64-microcode: An issue in “Zen 2” CPUs, under specific microarchitectural circumstances,may allow an attacker to potentially access... | 7.8 | 0.0507 |  |

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Data as of 2026-11-07T06:34:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo