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.

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Workaround

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History

Wed, 18 Feb 2026 15:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:free5gc:free5gc:4.0.1:*:*:*:*:*:*:*

Fri, 13 Feb 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Free5gc
Free5gc free5gc
Vendors & Products Free5gc
Free5gc free5gc

Fri, 13 Feb 2026 21:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-122
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 13 Feb 2026 16:30:00 +0000

Type Values Removed Values Added
Description 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.
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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-02-13T20:59:50.895Z

Reserved: 2026-01-09T00:00:00.000Z

Link: CVE-2025-70122

cve-icon Vulnrichment

Updated: 2026-02-13T20:59:47.284Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-13T17:16:12.090

Modified: 2026-02-18T15:40:09.237

Link: CVE-2025-70122

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-13T21:43:02Z

Weaknesses