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TI-2025-42701 Aliases CVE-2025-69248

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

Priority LOW 36CWE-129Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-129 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00658 51st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
free5gcamfup to 1.4.1—No fix listedCNA
  • amf Vendorfree5gc Affected up to 1.4.1 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:free5gc:amf:*:*:*:*:*:go:*:*up to 1.4.1Vulnerablefree5gc
  • cpe:2.3:a:free5gc:amf:*:*:*:*:*:go:*:* Versions up to 1.4.1 Vulnerable ·free5gc

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-69248
  2. 2026-10-21 EPSS moved to the 50th–90th percentile

References

Exploit 1

Patch 3

  • TI-2026-29764 free5GC AMF missing default case in Content-Type switch in HTTPUEContextTransfer CVSS 4.0MEDIUM 5.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences