CVE-2025-69247— free5GC has Heap Buffer Overflow in UPF Leading to Denial of Service
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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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
堆缓冲区溢出
Source: NVD (National Vulnerability Database)
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
II. Public POCs for CVE-2025-69247
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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 vendor: free5gc
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free5GC UDR: Fail-open handling in PolicyDataSubsToNotifyPos - CVE-2026-40249
free5gc UDR fail-open request handling in PolicyDataSubsToNo - CVE-2026-40248
free5gc UDR improper path validation allows unauthenticated
Same weakness: CWE-122
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