# CVE-2021-44109: Memory corruption in n/a

> Remote attackers can cause a denial of service in Open5GS via a crafted SBI request due to a buffer overflow.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Apr 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-q7f3-29mw-j94h

## What is CVE-2021-44109?

CVE-2021-44109 is a high-severity memory corruption vulnerability in Open5gs Open5gs, published on 5 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A buffer overflow in lib/sbi/message.c in Open5GS 2.3.6 and earlier allows remote attackers to Denial of Service via a crafted sbi request.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2021-44109?

It affects 1 product.


Products: Open5gs Open5gs.

## How do I fix CVE-2021-44109?

No fix has been published for CVE-2021-44109 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-44109 being exploited?

There is no known exploitation of CVE-2021-44109 in the wild and no public exploit code.

## Other vulnerabilities in Open5gs Open5gs

- [CVE-2024-40130](https://insights.sbomify.com/CVE-2024-40130/): Memory corruption in n/a (critical 9.8)
- [CVE-2021-28122](https://insights.sbomify.com/CVE-2021-28122/): Missing authorization in n/a (critical 9.8)
- [CVE-2021-25863](https://insights.sbomify.com/CVE-2021-25863/): Hardcoded credentials in n/a (high 8.8)
- [CVE-2025-41067](https://insights.sbomify.com/CVE-2025-41067/): Reachable Assertion vulnerability in Open5GS (high 8.7)
- [CVE-2025-41068](https://insights.sbomify.com/CVE-2025-41068/): Reachable Assertion vulnerability in Open5GS (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-44109 and fix it if it is affected.

What it is: CVE-2021-44109 is a high-severity memory corruption vulnerability in Open5gs Open5gs, published on 5 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-44109 in the wild and no public exploit code.

Affected product: Open5gs Open5gs. 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-2021-44109/ (Markdown: https://insights.sbomify.com/CVE-2021-44109/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-44109
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-44109
- OSV: https://osv.dev/vulnerability/CVE-2021-44109

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-44109/
Summaries are generated and may contain mistakes; the official description above is the record.