CVE-2025-69248CWE-129

free5GC has Array Index Out of Bounds in AMF Leading to Denial of Service

Medium · published February 23, 2026

CVSS v4.0
6.6
EPSS
1%
Percentile
50.8
In the wild
Unconfirmed
What it is

free5GC is an open-source project for 5th generation (5G) mobile core networks. Versions up to and including 1.4.1 of free5GC's AMF service have a Buffer Overflow vulnerability leading to Denial of Service. Remote unauthenticated attackers can crash the AMF service by sending a specially crafted NAS Registration Request with a malformed 5GS Mobile Identity, causing complete denial of service for the 5G core network. All deployments of free5GC using the AMF component may be affected. Pull request 43 of the free5gc/nas repo contains a fix. No direct workaround is available at the application level. Applying the official patch is recommended.

The record
Technical detail
CVSS v4.0
6.6 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U
EPSS
0.00658 · 50.8th percentile
Weakness
CWE-129 · Improper Validation of Array Index
Published
2026-02-23T21:42Z
EPSS history
Timeline
  • 23 FEB 21:42Z
    free5GC has Array Index Out of Bounds in AMF Leading to Denial of Service
    cvelistv5