# CVE-2021-26346: Integer overflow in Ryzen 5000 Series

> An integer overflow in the AMD Secure Processor bootloader allows attackers to cause a denial of service via SPI flash manipulation.

- **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 Jan 2023
- **Updated:** 9 Apr 2025
- **Also known as:** GHSA-pj35-9jc4-v6rm

## What is CVE-2021-26346?

CVE-2021-26346 is a medium-severity vulnerability in Ryzen 5000 Series, published on 10 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Failure to validate the integer operand in ASP (AMD Secure Processor) bootloader may allow an attacker to introduce an integer overflow in the L2 directory table in SPI flash resulting in a potential denial of service.

Weakness: CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2021-26346?

It affects 104 products.


Products: Amd Ryzen 3 3100 Firmware, Amd Ryzen 3 3200g Firmware, Amd Ryzen 3 3200u Firmware, Amd Ryzen 3 3250c Firmware, Amd Ryzen 3 3250u Firmware, Amd Ryzen 3 3300g Firmware, Amd Ryzen 3 3300u Firmware, Amd Ryzen 3 3300x Firmware, Amd Ryzen 3 3350u Firmware, Amd Ryzen 3 3450u Firmware, Amd Ryzen 3 3500c Firmware, Amd Ryzen 3 3500u Firmware, Amd Ryzen 3 3550h Firmware, Amd Ryzen 3 3580u Firmware, Amd Ryzen 3 3700c Firmware, Amd Ryzen 3 3700u Firmware, Amd Ryzen 3 3750h Firmware, Amd Ryzen 3 3780u Firmware, Amd Ryzen 3 5125c Firmware, Amd Ryzen 3 5300g Firmware and 84 more.

## How do I fix CVE-2021-26346?

No fix has been published for CVE-2021-26346 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-26346 being exploited?

There is no known exploitation of CVE-2021-26346 in the wild and no public exploit code.

## Other vulnerabilities in Ryzen 5000 Series

- [CVE-2021-26351](https://insights.sbomify.com/CVE-2021-26351/): Denial of service in Athlon™ Series (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-26346 and fix it if it is affected.

What it is: CVE-2021-26346 is a medium-severity vulnerability in Ryzen 5000 Series, published on 10 Jan 2023. 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-2021-26346 in the wild and no public exploit code.

Affected product: Ryzen 5000 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-2021-26346/ (Markdown: https://insights.sbomify.com/CVE-2021-26346/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-26346
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-26346
- OSV: https://osv.dev/vulnerability/CVE-2021-26346

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-26346/
Summaries are generated and may contain mistakes; the official description above is the record.