# CVE-2021-26367: Misconfiguration in AMD Athlon™ 3000 Series Desktop Processors with Radeon™ Graphics

> A local attacker can misconfigure Trusted Memory Regions in AMD processors, compromising system integrity and availability.

- **Severity:** Medium 5.7 (`CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/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:** 13 Aug 2024
- **Updated:** 4 Dec 2024
- **Also known as:** GHSA-2xq4-823c-q5v9

## What is CVE-2021-26367?

CVE-2021-26367 is a medium-severity vulnerability in Amd Radeon Software, published on 13 Aug 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A malicious attacker in x86 can misconfigure the Trusted Memory Regions (TMRs), which may allow the attacker to set an arbitrary address range for the TMR, potentially leading to a loss of integrity and availability.

## Which versions are affected by CVE-2021-26367?

It affects 36 products.


Products: Amd Athlon Gold 3150c Firmware, Amd Athlon Gold 3150g Firmware, Amd Athlon Gold 3150u Firmware, Amd Athlon Gold Pro 3150g Firmware, Amd Athlon Gold Pro 3150ge Firmware, Amd Athlon Pro 300ge Firmware, Amd Athlon Pro 3045b Firmware, Amd Athlon Pro 3145b Firmware, Amd Athlon Silver 3050c Firmware, Amd Athlon Silver 3050e Firmware, Amd Athlon Silver 3050u Firmware, Amd Radeon Software, Amd Ryzen 3 3300u Firmware, Amd Ryzen 3 3350u Firmware, Amd Ryzen 3 4300g Firmware, Amd Ryzen 3 4300ge Firmware, Amd Ryzen 3 5300g Firmware, Amd Ryzen 3 5300ge Firmware, Amd Ryzen 5 3450u Firmware, Amd Ryzen 5 3500c Firmware and 16 more.

## How do I fix CVE-2021-26367?

No fix has been published for CVE-2021-26367 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-26367 being exploited?

There is no known exploitation of CVE-2021-26367 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-26367 and fix it if it is affected.

What it is: CVE-2021-26367 is a medium-severity vulnerability in Amd Radeon Software, published on 13 Aug 2024. 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-2021-26367 in the wild and no public exploit code.

Affected product: Amd Radeon Software. 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-2021-26367/ (Markdown: https://insights.sbomify.com/CVE-2021-26367/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-26367
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-26367
- OSV: https://osv.dev/vulnerability/CVE-2021-26367

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-26367/
Summaries are generated and may contain mistakes; the official description above is the record.