---
id: CVE-2026-10565
title: Open5GS NGAP Handover gmm-sm.c gmm_state_security_mode race condition
summary: >-
  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. Th…
severity: low
cvss: 3.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C'
cvssSource: cna
cwe:
  - CWE-362
product: Open5GS
affected:
  - Open5GS 2.7.0
  - Open5GS 2.7.1
  - Open5GS 2.7.2
  - Open5GS 2.7.3
  - Open5GS 2.7.4
  - Open5GS 2.7.5
  - Open5GS 2.7.6
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-06-02T12:22:40.203143Z'
exploitAvailable: true
published: '2026-06-02'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T09:02:05.612Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-10565'
references:
  - url: 'https://vuldb.com/vuln/367672'
    label: >-
      VDB-367672 | Open5GS NGAP Handover gmm-sm.c gmm_state_security_mode race
      condition
  - url: 'https://vuldb.com/vuln/367672/cti'
    label: 'VDB-367672 | CTI Indicators (IOB, IOC, IOA)'
  - url: 'https://vuldb.com/cve/CVE-2026-10565'
    label: CVE-2026-10565 | CVE Analysis and Report
  - url: 'https://vuldb.com/submit/818938'
    label: 'Submit #818938 | open5gs v2.7.6 Race Condition'
  - url: 'https://github.com/open5gs/open5gs/issues/4497'
  - url: 'https://github.com/open5gs/open5gs/pull/4501'
  - url: 'https://github.com/user-attachments/files/27111025/N2-SMC-Concurrent.zip'
  - url: 'https://github.com/open5gs/open5gs/'
tags:
  - cve.org
  - exploit-available
epss: 0.00224
epssPercentile: 0.12247
ingestedAt: '2026-10-21T09:46:15.396Z'
---

## Overview

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.

## Affected

- `Open5GS 2.7.0`
- `Open5GS 2.7.1`
- `Open5GS 2.7.2`
- `Open5GS 2.7.3`
- `Open5GS 2.7.4`
- `Open5GS 2.7.5`
- `Open5GS 2.7.6`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.