# CVE-2023-20577 — AMD Ryzen™ 5000 Series Desktop Processors with Radeon™ Graphics

> As of 2026-09-03, CVE-2023-20577 is a HIGH-severity vulnerability in AMD Ryzen™ 5000 Series Desktop Processors with Radeon™ Graphics, CVSS v3.1 7.4, EPSS 0.1% (5.4th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2023-20577 as of 2026-09-03; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-03

## What is CVE-2023-20577?

A heap overflow in SMM module may allow an attacker with access to a second vulnerability that enables writing to SPI flash, potentially resulting in arbitrary code execution.

The record classifies CVE-2023-20577 under weakness class [CWE-121](https://intel.threadlinqs.com/cwe/CWE-121). Its CVSS v3 base vector states that the flaw requires local access to the host, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 12 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 33 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.4 — HIGH (`CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 5.4% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 3.9/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-02, last modified 2026-09-03

## Is CVE-2023-20577 being exploited?

It currently carries a trending score of 31 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **AMD**: 2nd Gen AMD EPYC™ Processors, 3rd Gen AMD EPYC™ Processors, 4th Gen AMD EPYC™ Processors, Instinct™ MI300A, Ryzen™ 3000 Series Desktop Processors, Ryzen™ 5000 Series Desktop Processors, Ryzen™ 5000 Series Desktop Processors with Radeon™ Graphics, Ryzen™ 7000 Series Processors, Athlon™ 3000 Series Desktop Processors with Radeon™ Graphics, Ryzen™ 4000 Series Desktop Processors with Radeon™ Graphics, Ryzen™ Threadripper™ 3000 Series Processors, Ryzen™ Threadripper™ PRO 3000WX Series Processors

## How to fix CVE-2023-20577

No vendor patch reference has been recorded for CVE-2023-20577 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2023-20577

No threat campaign in the Threadlinqs corpus currently references CVE-2023-20577, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-09-04.

**Other references**

- [amd.com](https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7009.html)

Canonical: https://intel.threadlinqs.com/cve/CVE-2023-20577
Full detection coverage and IOCs for threats exploiting CVE-2023-20577 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp