# CVE-2021-26382: Security feature bypass in Athlon™ Series

> A root user can bypass firmware signing checks on AMD Audio Co-Processors, potentially causing a denial of service.

- **Severity:** Medium 4.4 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Jul 2022
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-w6fw-9866-83f5

## What is CVE-2021-26382?

CVE-2021-26382 is a medium-severity vulnerability in AMD Athlon™ Series, published on 14 Jul 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An attacker with root account privileges can load any legitimately signed firmware image into the Audio Co-Processor (ACP,) irrespective of the respective signing key being declared as usable for authenticating an ACP firmware image, potentially resulting in a denial of service.

## Which versions are affected by CVE-2021-26382?

It affects 35 products.


Products: Amd Ryzen 3 3200u Firmware, Amd Ryzen 3 3250u Firmware, Amd Ryzen 3 3300u Firmware, Amd Ryzen 3 5125c Firmware, Amd Ryzen 3 5300g Firmware, Amd Ryzen 3 5300ge Firmware, Amd Ryzen 3 5400u Firmware, Amd Ryzen 3 5425c Firmware, Amd Ryzen 3 5425u Firmware, Amd Ryzen 5 3500u Firmware, Amd Ryzen 5 3550h Firmware, Amd Ryzen 5 3580u Firmware, Amd Ryzen 5 5560u Firmware, Amd Ryzen 5 5600g Firmware, Amd Ryzen 5 5600ge Firmware, Amd Ryzen 5 5600h Firmware, Amd Ryzen 5 5600hs Firmware, Amd Ryzen 5 5600u Firmware, Amd Ryzen 5 5625c Firmware, Amd Ryzen 5 5625u Firmware and 15 more.

## How do I fix CVE-2021-26382?

No fix has been published for CVE-2021-26382 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-26382 being exploited?

There is no known exploitation of CVE-2021-26382 in the wild and no public exploit code.

## Other vulnerabilities in AMD Athlon™ Series

- [CVE-2023-20579](https://insights.sbomify.com/CVE-2023-20579/): Security feature bypass in AMD Ryzen™ 3000 Series Processors with Radeon™ Graphics (low 3.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-26382 and fix it if it is affected.

What it is: CVE-2021-26382 is a medium-severity vulnerability in AMD Athlon™ Series, published on 14 Jul 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-26382 in the wild and no public exploit code.

Affected product: AMD Athlon™ Series. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-26382/ (Markdown: https://insights.sbomify.com/CVE-2021-26382/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-26382
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-26382
- OSV: https://osv.dev/vulnerability/CVE-2021-26382

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-26382/
Summaries are generated and may contain mistakes; the official description above is the record.