# CVE-2020-26142: Other in n/a

> An attacker can inject arbitrary network packets by exploiting how the OpenBSD kernel handles fragmented frames in WEP, WPA, WPA2, and WPA3 implementations.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 11 May 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-f2g3-x645-4qw2, ROOT-OS-UBUNTU-2204-CVE-2020-26142, UBUNTU-CVE-2020-26142

## What is CVE-2020-26142?

CVE-2020-26142 is a medium-severity vulnerability in Openbsd Openbsd, published on 11 May 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

An issue was discovered in the kernel in OpenBSD 6.6. The WEP, WPA, WPA2, and WPA3 implementations treat fragmented frames as full frames. An adversary can abuse this to inject arbitrary network packets, independent of the network configuration.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2020-26142?

It affects 1 product.


Products: Openbsd Openbsd.

## How do I fix CVE-2020-26142?

Apply the vendor's patch.

## Is CVE-2020-26142 being exploited?

There is no known exploitation of CVE-2020-26142 in the wild and no public exploit code.

## Other vulnerabilities in Openbsd Openbsd

- [CVE-2007-1365](https://insights.sbomify.com/CVE-2007-1365/): Memory corruption in n/a (critical 10.0)
- [CVE-2004-0220](https://insights.sbomify.com/CVE-2004-0220/): Integer overflow in n/a (critical 10.0)
- [CVE-2004-0083](https://insights.sbomify.com/CVE-2004-0083/): Memory corruption in n/a (critical 10.0)
- [CVE-2004-0084](https://insights.sbomify.com/CVE-2004-0084/): Memory corruption in n/a (critical 10.0)
- [CVE-2001-0284](https://insights.sbomify.com/CVE-2001-0284/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-26142 and fix it if it is affected.

What it is: CVE-2020-26142 is a medium-severity vulnerability in Openbsd Openbsd, published on 11 May 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-26142 in the wild and no public exploit code.

Affected product: Openbsd Openbsd. 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-2020-26142/ (Markdown: https://insights.sbomify.com/CVE-2020-26142/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-26142
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-26142
- OSV: https://osv.dev/vulnerability/CVE-2020-26142

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-26142/
Summaries are generated and may contain mistakes; the official description above is the record.