# CVE-2022-26859: Race condition in CPG BIOS

> A local attacker can exploit a race condition in Dell BIOS to bypass security checks during System Management Mode.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:H/A:N`)
- **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:** 6 Sep 2022
- **Updated:** 27 May 2026
- **Also known as:** GHSA-m639-pxcj-g467

## What is CVE-2022-26859?

CVE-2022-26859 is a medium-severity vulnerability in Dell Chengming 3980 Firmware, published on 6 Sep 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Dell BIOS contains a race condition vulnerability. A local attacker could exploit this vulnerability by sending malicious input via SMI in order to bypass security checks during SMM.

Weakness: CWE-367 (Time-of-check Time-of-use (TOCTOU) Race Condition)

## Which versions are affected by CVE-2022-26859?

It affects 399 products.


Products: Dell Alienware M15 R6 Firmware, Dell Chengming 3980 Firmware, Dell Chengming 3988 Firmware, Dell Chengming 3990 Firmware, Dell Chengming 3991 Firmware, Dell Edge Gateway 3000 Firmware, Dell Edge Gateway 5000 Firmware, Dell Embedded Box Pc 3000 Firmware, Dell Embedded Box Pc 5000 Firmware, Dell G15 5510 Firmware, Dell G15 5511 Firmware, Dell G3 15 3590 Firmware, Dell G3 3500 Firmware, Dell G3 3579 Firmware, Dell G5 15 5587 Firmware, Dell G5 15 5590 Firmware, Dell G5 5000 Firmware, Dell G5 5090 Firmware, Dell G5 5500 Firmware, Dell G7 17 7700 Firmware and 379 more.

## How do I fix CVE-2022-26859?

No fix has been published for CVE-2022-26859 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-26859 being exploited?

There is no known exploitation of CVE-2022-26859 in the wild and no public exploit code.

## Other vulnerabilities in Dell Chengming 3980 Firmware

- [CVE-2024-52541](https://insights.sbomify.com/CVE-2024-52541/): Auth bypass in Dell Client Platform BIOS (high 8.2)
- [CVE-2022-26861](https://insights.sbomify.com/CVE-2022-26861/): Code injection in CPG BIOS (high 7.9)
- [CVE-2022-34403](https://insights.sbomify.com/CVE-2022-34403/): Memory corruption in CPG BIOS (high 7.5)
- [CVE-2022-26860](https://insights.sbomify.com/CVE-2022-26860/): Memory corruption in CPG BIOS (high 7.5)
- [CVE-2021-21572](https://insights.sbomify.com/CVE-2021-21572/): Memory corruption in BIOSConnect (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-26859 and fix it if it is affected.

What it is: CVE-2022-26859 is a medium-severity vulnerability in Dell Chengming 3980 Firmware, published on 6 Sep 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-2022-26859 in the wild and no public exploit code.

Affected product: Dell Chengming 3980 Firmware. 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-2022-26859/ (Markdown: https://insights.sbomify.com/CVE-2022-26859/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-26859
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-26859
- OSV: https://osv.dev/vulnerability/CVE-2022-26859

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-26859/
Summaries are generated and may contain mistakes; the official description above is the record.