# CVE-2021-26390: Memory corruption in Athlon™ Series

> A malicious application can corrupt arbitrary memory via the bootloader, compromising data integrity on AMD Athlon and Ryzen processors.

- **Severity:** Medium 6.2 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 May 2022
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-rrm7-mqj7-wfrw

## What is CVE-2021-26390?

CVE-2021-26390 is a medium-severity memory corruption vulnerability in AMD Athlon™ Series, published on 10 May 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A malicious or compromised UApp or ABL may coerce the bootloader into corrupting arbitrary memory potentially leading to loss of integrity of data.

## Which versions are affected by CVE-2021-26390?

It affects 37 products.


Products: Amd Athlon 300u Firmware, Amd Ryzen 3 3200u Firmware, Amd Ryzen 3 3300u Firmware, Amd Ryzen 3 5300g Firmware, Amd Ryzen 3 5300ge Firmware, Amd Ryzen 5 2600 Firmware, Amd Ryzen 5 2600x Firmware, Amd Ryzen 5 2700 Firmware, Amd Ryzen 5 2700x Firmware, Amd Ryzen 5 3500u Firmware, Amd Ryzen 5 3550h Firmware, Amd Ryzen 5 3600 Firmware, Amd Ryzen 5 3600x Firmware, Amd Ryzen 5 5600g Firmware, Amd Ryzen 5 5600ge Firmware, Amd Ryzen 5 5600x Firmware, Amd Ryzen 7 3700u Firmware, Amd Ryzen 7 3700x Firmware, Amd Ryzen 7 3750h Firmware, Amd Ryzen 7 3800x Firmware and 17 more.

## How do I fix CVE-2021-26390?

No fix has been published for CVE-2021-26390 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-26390 being exploited?

There is no known exploitation of CVE-2021-26390 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-26390 and fix it if it is affected.

What it is: CVE-2021-26390 is a medium-severity memory corruption vulnerability in AMD Athlon™ Series, published on 10 May 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-2021-26390 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-2021-26390/ (Markdown: https://insights.sbomify.com/CVE-2021-26390/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-26390
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-26390
- OSV: https://osv.dev/vulnerability/CVE-2021-26390

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-26390/
Summaries are generated and may contain mistakes; the official description above is the record.