# CVE-2016-8226: Denial of service in System X M5, M6, and X6 BIOS

> Administrators can cause a denial of service in Lenovo System X servers by updating a specific UEFI data structure in the BIOS.

- **Severity:** Medium 4.9 (`CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Jan 2017
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-r36x-m74h-q43p

## What is CVE-2016-8226?

CVE-2016-8226 is a medium-severity denial of service vulnerability in Lenovo Group Ltd. System X M5, M6, and X6 BIOS, published on 26 Jan 2017. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

The BIOS in Lenovo System X M5, M6, and X6 systems allows administrators to cause a denial of service via updating a UEFI data structure.

Weakness: CWE-19

## Which versions are affected by CVE-2016-8226?

It affects 11 products.


Products: Lenovo Flex System X240 M5 Bios, Lenovo Flex System X280 M6 Bios, Lenovo Flex System X480 X6 Bios, Lenovo Flex System X880 X6 Bios, Lenovo Nextscale Nx360 M5 Bios, Lenovo System X3250 M6 Bios, Lenovo System X3500 M5 Bios, Lenovo System X3550 M5 Bios, Lenovo System X3650 M5 Bios, Lenovo System X3850 X6 Bios, Lenovo System X3950 X6 Bios.

## How do I fix CVE-2016-8226?

No fix has been published for CVE-2016-8226 yet. Limit exposure of the affected software until one is available.

## Is CVE-2016-8226 being exploited?

There is no known exploitation of CVE-2016-8226 in the wild and no public exploit code.

## Other vulnerabilities in Lenovo Group Ltd. System X M5, M6, and X6 BIOS

- [CVE-2017-3775](https://insights.sbomify.com/CVE-2017-3775/): Security feature bypass in Some Lenovo Flex System and Lenovo System x products (medium 6.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-8226 and fix it if it is affected.

What it is: CVE-2016-8226 is a medium-severity denial of service vulnerability in Lenovo Group Ltd. System X M5, M6, and X6 BIOS, published on 26 Jan 2017. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2016-8226 in the wild and no public exploit code.

Affected product: Lenovo Group Ltd. System X M5, M6, and X6 BIOS. 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-2016-8226/ (Markdown: https://insights.sbomify.com/CVE-2016-8226/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-8226
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-8226
- OSV: https://osv.dev/vulnerability/CVE-2016-8226

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From sbomify Insights: https://insights.sbomify.com/CVE-2016-8226/
Summaries are generated and may contain mistakes; the official description above is the record.