---
id: CVE-2026-94043
title: A vulnerability was determined in Free5GC up to 4.2.3
summary: >-
  A vulnerability was determined in Free5GC up to 4.2.3. This vulnerability
  affects unknown code of the file
  /corefuzzer_deps/free5gc/NFs/amf/internal/gmm/handler.go of the component Gmm
  Handler. This manipulation causes race condition. Th…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-362
product: Free5GC
affected:
  - Free5GC 4.2.0
  - Free5GC 4.2.1
  - Free5GC 4.2.2
  - Free5GC 4.2.3
published: '2026-09-20'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T20:17:40.040'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-94043'
references:
  - url: >-
      https://github.com/free5gc/amf/commit/e323b01464355781b8b8d5dd695e05cbc00a62f2
    label: cna@vuldb.com
  - url: 'https://github.com/free5gc/amf/pull/238'
    label: cna@vuldb.com
  - url: 'https://github.com/free5gc/free5gc/'
    label: cna@vuldb.com
  - url: 'https://github.com/free5gc/free5gc/issues/1109'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-94043'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/949261'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/407972'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/407972/cti'
    label: cna@vuldb.com
  - url: 'https://github.com/free5gc/free5gc/issues/1109'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://vuldb.com/submit/949261'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-21T19:49:56.264821Z'
epss: 0.00572
epssPercentile: 0.4509
ingestedAt: '2026-09-20T18:24:59.758Z'
---

## Overview

A vulnerability was determined in Free5GC up to 4.2.3. This vulnerability affects unknown code of the file /corefuzzer_deps/free5gc/NFs/amf/internal/gmm/handler.go of the component Gmm Handler. This manipulation causes race condition. The attack can be initiated remotely. Patch name: e323b01464355781b8b8d5dd695e05cbc00a62f2. To fix this issue, it is recommended to deploy a patch.

## Remediation

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