# CVE-2025-65559: Denial of service in n/a

> A remote attacker can crash the Open5GS User Plane Function by sending a malformed PFCP Session Establishment Request with mismatched TEID flags.

- **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:** 18 Dec 2025
- **Updated:** 19 Dec 2025
- **Also known as:** GHSA-vpvv-3968-xxmc

## What is CVE-2025-65559?

CVE-2025-65559 is a high-severity denial of service vulnerability in Open5gs Open5gs, published on 18 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in Open5GS 2.7.5-49-g465e90f, when processing a PFCP Session Establishment Request (type=50), the UPF crashes with a reachable assertion in `lib/pfcp/context.c` (`ogs_pfcp_object_teid_hash_set`) if the CreatePDR?PDI?F-TEID has CH=1 and the F-TEID address-family flag(s) (IPv4/IPv6) do not match the GTP-U resource family configured for the selected DNN (Network Instance), resulting in a denial of service.

Weakness: CWE-617 (Reachable Assertion)

## Which versions are affected by CVE-2025-65559?

It affects 1 product.


Products: Open5gs Open5gs.

## How do I fix CVE-2025-65559?

No fix has been published for CVE-2025-65559 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-65559 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-65559 exists.

## 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-2025-65559 and fix it if it is affected.

What it is: CVE-2025-65559 is a high-severity denial of service vulnerability in Open5gs Open5gs, published on 18 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-65559 exists.

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-2025-65559/ (Markdown: https://insights.sbomify.com/CVE-2025-65559/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-65559
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-65559
- OSV: https://osv.dev/vulnerability/CVE-2025-65559

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-65559/
Summaries are generated and may contain mistakes; the official description above is the record.