# CVE-2026-10565: Open5GS NGAP Handover gmm-sm.c gmm_state_security_mode race condition

> A remote attacker can exploit a race condition in Open5GS NGAP Handover to cause a denial of service, requiring high complexity.

- **Severity:** Low 2.3 (`CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Jun 2026
- **Updated:** 21 Oct 2026
- **Also known as:** GHSA-94vg-m7v6-9c25

## What is CVE-2026-10565?

CVE-2026-10565 is a low-severity vulnerability in Open5GS, published on 2 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A security flaw has been discovered in Open5GS up to 2.7.6. The impacted element is the function gmm_state_security_mode of the file src/amf/gmm-sm.c of the component NGAP Handover. Performing a manipulation results in race condition. The attack can be initiated remotely. The complexity of an attack is rather high. The exploitability is regarded as difficult. The exploit has been released to the public and may be used for attacks. The pull request to fix this issue awaits acceptance.

Weakness: CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization)

## Which versions are affected by CVE-2026-10565?


## How do I fix CVE-2026-10565?

No fix has been published for CVE-2026-10565 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-10565 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-10565 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-10565 and fix it if it is affected.

What it is: CVE-2026-10565 is a low-severity vulnerability in Open5GS, published on 2 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-10565 exists.

Affected product: 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-2026-10565/ (Markdown: https://insights.sbomify.com/CVE-2026-10565/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-10565
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-10565
- OSV: https://osv.dev/vulnerability/CVE-2026-10565

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-10565/
Summaries are generated and may contain mistakes; the official description above is the record.