# CVE-2022-41861: Denial of service in freeradius

> A malicious RADIUS client or home server can crash the FreeRADIUS server by sending a malformed binary attribute.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/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:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 17 Jan 2023
- **Updated:** 3 Nov 2025
- **Also known as:** ALPINE-CVE-2022-41861, AZL-13063, DEBIAN-CVE-2022-41861, GHSA-3886-rc87-ccgx, UBUNTU-CVE-2022-41861

## What is CVE-2022-41861?

CVE-2022-41861 is a medium-severity denial of service vulnerability in freeradius, published on 17 Jan 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A flaw was found in freeradius. A malicious RADIUS client or home server can send a malformed abinary attribute which can cause the server to crash.

Weakness: CWE-20 (Improper Input Validation), CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2022-41861?

It affects 1 product.


Products: Freeradius Freeradius.

## How do I fix CVE-2022-41861?

Apply the vendor's patch.

## Is CVE-2022-41861 being exploited?

There is no known exploitation of CVE-2022-41861 in the wild and no public exploit code.

## Other vulnerabilities in freeradius

- [CVE-2017-10979](https://insights.sbomify.com/CVE-2017-10979/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-10984](https://insights.sbomify.com/CVE-2017-10984/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-9148](https://insights.sbomify.com/CVE-2017-9148/): Auth bypass in n/a (critical 9.8)
- [CVE-2015-8763](https://insights.sbomify.com/CVE-2015-8763/): Memory corruption in n/a (high 8.1)
- [CVE-2015-8764](https://insights.sbomify.com/CVE-2015-8764/): Memory corruption in n/a (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-41861 and fix it if it is affected.

What it is: CVE-2022-41861 is a medium-severity denial of service vulnerability in freeradius, published on 17 Jan 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-41861 in the wild and no public exploit code.

Affected product: freeradius. 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-2022-41861/ (Markdown: https://insights.sbomify.com/CVE-2022-41861/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-41861
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-41861
- OSV: https://osv.dev/vulnerability/CVE-2022-41861

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-41861/
Summaries are generated and may contain mistakes; the official description above is the record.