# CVE-2021-26391: Security feature bypass in AMD Radeon RX 5000 Series & PRO W5000 Series

> An attacker with privileges can bypass signature verification to execute arbitrary code in Trusted Applications or the kernel on AMD Radeon GPUs.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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:** 9 Nov 2022
- **Updated:** 1 May 2025
- **Also known as:** GHSA-cm49-fh74-75ch

## What is CVE-2021-26391?

CVE-2021-26391 is a high-severity vulnerability in Amd Radeon Software, published on 9 Nov 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Insufficient verification of multiple header signatures while loading a Trusted Application (TA) may allow an attacker with privileges to gain code execution in that TA or the OS/kernel.

Weakness: CWE-347 (Improper Verification of Cryptographic Signature)

## Which versions are affected by CVE-2021-26391?

It affects 26 products.


Products: Amd Enterprise Driver, Amd Radeon Pro Software, Amd Radeon Rx Vega 56 Firmware, Amd Radeon Rx Vega 64 Firmware, Amd Radeon Software, Amd Ryzen 3 5300g Firmware, Amd Ryzen 3 5300ge Firmware, Amd Ryzen 3 5300u Firmware, Amd Ryzen 3 5400u Firmware, Amd Ryzen 5 5500u 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 7 5700g Firmware, Amd Ryzen 7 5700ge Firmware, Amd Ryzen 7 5700u Firmware, Amd Ryzen 7 5800h Firmware and 6 more.

## How do I fix CVE-2021-26391?

No fix has been published for CVE-2021-26391 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-26391 being exploited?

There is no known exploitation of CVE-2021-26391 in the wild and no public exploit code.

## Other vulnerabilities in Amd Radeon Software

- [CVE-2021-26360](https://insights.sbomify.com/CVE-2021-26360/): Privilege escalation in AMD Radeon RX 6000 Series & PRO W6000 Series (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-26391 and fix it if it is affected.

What it is: CVE-2021-26391 is a high-severity vulnerability in Amd Radeon Software, published on 9 Nov 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-2021-26391 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-2021-26391/ (Markdown: https://insights.sbomify.com/CVE-2021-26391/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-26391
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-26391
- OSV: https://osv.dev/vulnerability/CVE-2021-26391

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-26391/
Summaries are generated and may contain mistakes; the official description above is the record.