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CVE-2025-69247— free5GC has Heap Buffer Overflow in UPF Leading to Denial of Service

Quick assessment

Affected
free5gc go-upf
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

free5GC是free5GC开源的一个第 5 代 (5G) 移动核心网络的开源项目。 free5GC 1.2.8之前版本存在安全漏洞，该漏洞源于堆缓冲区溢出，可能导致拒绝服务。

AI Predicted 8.1 Difficulty: Easy EPSS 0.55% · P44

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-69247

Vulnerability Information
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Vulnerability Title
free5GC has Heap Buffer Overflow in UPF Leading to Denial of Service
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
free5GC 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
free5GC是free5GC开源的一个第 5 代 (5G) 移动核心网络的开源项目。 free5GC 1.2.8之前版本存在安全漏洞，该漏洞源于堆缓冲区溢出，可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
free5gc go-upf < 1.2.8 -

II. Public POCs for CVE-2025-69247

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III. Intelligence Information for CVE-2025-69247

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Proof of Concept for CVE-2025-69247 (1)

Same Patch Batch · free5gc · 2026-02-23 · 7 CVEs total

CVE-2025-69208 free5GC UDR's NEF incorrectly returns 500 for missing PFD data (UDR 404) in Nnef_PfdManage
CVE-2025-69248 free5GC has Array Index Out of Bounds in AMF Leading to Denial of Service
CVE-2025-69232 free5GC hasProtocol Compliance Violation in UPF Leading to SMF Service Disruption
CVE-2025-69250 free5GC has Improper Error Handling in UDM, Leading to Information Exposure
CVE-2025-69251 free5GC has Improper Input Validation in UDM, Leading to Information Exposure
CVE-2025-69252 free5GC has Null Pointer Dereference in UDM, Leading to Service Panic

IV. Related Vulnerabilities

Same product: go-upf
Same vendor: free5gc
Same weakness: CWE-122

V. Comments for CVE-2025-69247

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