# CVE-2021-26352: Denial of service in Athlon™ Series

> Insufficient bound checks in AMD SMU PCIe Hot Plug table allow access to invalid memory, potentially causing a denial of service.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **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-x9rp-5q33-qx3p

## What is CVE-2021-26352?

CVE-2021-26352 is a medium-severity denial of service 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

Insufficient bound checks in System Management Unit (SMU) PCIe Hot Plug table may result in access/updates from/to invalid address space that could result in denial of service.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2021-26352?

It affects 30 products.


Products: 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 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 3700x Firmware, Amd Ryzen 7 3800x Firmware, Amd Ryzen 7 5700g Firmware, Amd Ryzen 7 5700ge Firmware, Amd Ryzen 7 5800x Firmware, Amd Ryzen 9 3900x Firmware, Amd Ryzen 9 3950x Firmware, Amd Ryzen 9 5900x Firmware, Amd Ryzen 9 5950x Firmware and 10 more.

## How do I fix CVE-2021-26352?

No fix has been published for CVE-2021-26352 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-26352 being exploited?

There is no known exploitation of CVE-2021-26352 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-26352 and fix it if it is affected.

What it is: CVE-2021-26352 is a medium-severity denial of service 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-2021-26352 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-2021-26352/ (Markdown: https://insights.sbomify.com/CVE-2021-26352/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-26352
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-26352
- OSV: https://osv.dev/vulnerability/CVE-2021-26352

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-26352/
Summaries are generated and may contain mistakes; the official description above is the record.