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TI-2025-42700 Aliases CVE-2025-69247

free5GC has Heap Buffer Overflow in UPF Leading to Denial of Service

Priority LOW 21CWE-122Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

free5GC go-upf is the User Plane Function (UPF) implementation for 5G networks that is part of the free5GC project. Versions prior to 1.2.8 have a Heap-based Buffer Overflow (CWE-122) vulnerability leading to Denial of Service. Remote attackers can crash the UPF network element by sending a specially crafted PFCP Session Modification Request with an invalid SDF Filter length field. This causes a heap buffer overflow, resulting in complete service disruption for all connected UEs and potential cascading failures affecting the SMF. All deployments of free5GC using the UPF component may be affected. Version 1.2.8 of go-upf contains a fix.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00614 49th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed go-upf (free5gc): 1.2.8

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
free5gcgo-upfbefore 1.2.81.2.8Patch availableCNA
  • go-upf Vendorfree5gc Affected before 1.2.8 Fixed in 1.2.8 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:free5gc:go-upf:*:*:*:*:*:go:*:*before 1.2.8Vulnerablefree5gc
  • cpe:2.3:a:free5gc:go-upf:*:*:*:*:*:go:*:* Versions before 1.2.8 Vulnerable ·free5gc

Remediation

  • Fix · CNA go-upf (free5gc) Fixed in 1.2.8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-69247

References

Exploit 1

Patch 3

  • TI-2025-42686 free5GC hasProtocol Compliance Violation in UPF Leading to SMF Service Disruption CVSS 4.0LOW 2.7

Sources

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