CVE-2025-70122

A heap buffer overflow vulnerability in the UPF component of free5GC v4.0.1 allows remote attackers to cause a denial of service via a crafted PFCP Session Modification Request. The issue occurs in the SDFFilterFields.UnmarshalBinary function (sdf-filter.go) when processing a declared length that exceeds the actual buffer capacity, leading to a runtime panic and UPF crash.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/free5gc/free5gc/issues/746	Exploit Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:free5gc:free5gc:4.0.1:*:*:*:*:*:*:*

History

17 Jun 2026, 10:03

Type	Values Removed	Values Added
Summary		(es) Una vulnerabilidad de desbordamiento de búfer en el heap en el componente UPF de free5GC v4.0.1 permite a atacantes remotos causar una denegación de servicio a través de una Solicitud de Modificación de Sesión PFCP manipulada. El problema ocurre en la función SDFFilterFields.UnmarshalBinary (sdf-filter.go) al procesar una longitud declarada que excede la capacidad real del búfer, lo que lleva a un pánico en tiempo de ejecución y a un fallo del UPF.

18 Feb 2026, 15:40

Type	Values Removed	Values Added
CPE		cpe:2.3:a:free5gc:free5gc:4.0.1:::::::*
References	~~() https://github.com/free5gc/free5gc/issues/746 -~~	() https://github.com/free5gc/free5gc/issues/746 - Exploit, Issue Tracking, Vendor Advisory
First Time		Free5gc free5gc Free5gc

13 Feb 2026, 21:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
CWE		CWE-122

13 Feb 2026, 17:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-02-13 17:16

Updated : 2026-06-17 10:03

NVD link : CVE-2025-70122

Mitre link : CVE-2025-70122

CVE.ORG link : CVE-2025-70122

JSON object : View

Products Affected

free5gc

free5gc

CWE

CWE-122

Heap-based Buffer Overflow

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