# CVE-2021-26362: Privilege escalation in Athlon™ Series

> A malicious application can issue malformed system calls to map sensitive SMN registers, compromising integrity and availability on AMD processors.

- **Severity:** High 7.1 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/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:** 12 May 2022
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-frvj-25f8-q983

## What is CVE-2021-26362?

CVE-2021-26362 is a high-severity vulnerability in Amd Radeon Software, published on 12 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 be used by an attacker to issue a malformed system call which results in mapping sensitive System Management Network (SMN) registers leading to a loss of integrity and availability.

## Which versions are affected by CVE-2021-26362?

It affects 36 products.


Products: Amd Athlon 3050ge Firmware, Amd Athlon 3150g Firmware, Amd Athlon 3150ge Firmware, Amd Radeon Software, Amd Ryzen 3 2200u Firmware, Amd Ryzen 3 2300u Firmware, Amd Ryzen 3 5125c Firmware, Amd Ryzen 3 5400u Firmware, Amd Ryzen 3 5425c Firmware, Amd Ryzen 3 5425u Firmware, Amd Ryzen 5 2500u Firmware, Amd Ryzen 5 2600 Firmware, Amd Ryzen 5 2600h Firmware, Amd Ryzen 5 2600x Firmware, Amd Ryzen 5 5560u Firmware, Amd Ryzen 5 5600h Firmware, Amd Ryzen 5 5600hs Firmware, Amd Ryzen 5 5600u Firmware, Amd Ryzen 5 5600x Firmware, Amd Ryzen 5 5625c Firmware and 16 more.

## How do I fix CVE-2021-26362?

No fix has been published for CVE-2021-26362 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-26362 being exploited?

There is no known exploitation of CVE-2021-26362 in the wild and no public exploit code.

## Other vulnerabilities in Amd Radeon Software

- [CVE-2021-26316](https://insights.sbomify.com/CVE-2021-26316/): Memory corruption in 1st Gen EPYC (high 7.8)
- [CVE-2021-26317](https://insights.sbomify.com/CVE-2021-26317/): Security feature bypass in Athlon™ Series (high 7.8)
- [CVE-2021-26369](https://insights.sbomify.com/CVE-2021-26369/): Memory corruption in Athlon™ Series (high 7.8)
- [CVE-2020-12965](https://insights.sbomify.com/CVE-2020-12965/): Information disclosure in All supported processors (high 7.5)
- [CVE-2021-26366](https://insights.sbomify.com/CVE-2021-26366/): Information disclosure in Athlon™ Series (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-26362 and fix it if it is affected.

What it is: CVE-2021-26362 is a high-severity vulnerability in Amd Radeon Software, published on 12 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-2021-26362 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-2021-26362/ (Markdown: https://insights.sbomify.com/CVE-2021-26362/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-26362
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-26362
- OSV: https://osv.dev/vulnerability/CVE-2021-26362

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-26362/
Summaries are generated and may contain mistakes; the official description above is the record.