# CVE-2025-15529: Open5GS s5c-handler.c sgwc_s5c_handle_create_session_response denial of service

> Remote attackers can cause a denial of service in Open5GS by manipulating the S5C create session response handling.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Jan 2026
- **Updated:** 23 Feb 2026
- **Also known as:** GHSA-4mf2-6634-xrph

## What is CVE-2025-15529?

CVE-2025-15529 is a medium-severity denial of service vulnerability in Open5gs Open5gs, published on 16 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was found in Open5GS up to 2.7.6. Affected by this issue is the function sgwc_s5c_handle_create_session_response of the file src/sgwc/s5c-handler.c. Performing a manipulation results in denial of service. Remote exploitation of the attack is possible. The exploit has been made public and could be used. The patch is named b19cf6a2dbf5d30811be4488bf059c865bd7d1d2. To fix this issue, it is recommended to deploy a patch.

Weakness: CWE-404 (Improper Resource Shutdown or Release)

## Which versions are affected by CVE-2025-15529?

It affects 1 product.


Products: Open5gs Open5gs.

## How do I fix CVE-2025-15529?

No fix has been published for CVE-2025-15529 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-15529 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-15529 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-2025-15529 and fix it if it is affected.

What it is: CVE-2025-15529 is a medium-severity denial of service vulnerability in Open5gs Open5gs, published on 16 Jan 2026. 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-2025-15529 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-2025-15529/ (Markdown: https://insights.sbomify.com/CVE-2025-15529/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-15529
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-15529
- OSV: https://osv.dev/vulnerability/CVE-2025-15529

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-15529/
Summaries are generated and may contain mistakes; the official description above is the record.