CVE-2026-1683— Free5GC SMF PFCP handler.go HandlePfcpSessionReportRequest denial of service
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I. Basic Information for CVE-2026-1683
Vulnerability Information
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Vulnerability Title
Free5GC SMF PFCP handler.go HandlePfcpSessionReportRequest denial of service
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability has been found in Free5GC SMF up to 4.1.0. Affected by this vulnerability is the function HandlePfcpSessionReportRequest of the file internal/pfcp/handler/handler.go of the component PFCP. The manipulation leads to denial of service. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used. To fix this issue, it is recommended to deploy a patch.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
不恰当的资源关闭或释放
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 4.1.0及之前版本存在安全漏洞，该漏洞源于PFCP组件中internal/pfcp/handler/handler.go文件的HandlePfcpSessionReportRequest函数存在操作不当，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-2026-1683
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Same Patch Batch · Free5GC · 2026-01-30 · 3 CVEs total
| CVE-2026-1682 | 5.3 MEDIUM | Free5GC SMF PFCP UDP Endpoint handler.go HandlePfcpAssociationReleaseRequest null pointer |
| CVE-2026-1684 | 5.3 MEDIUM | Free5GC SMF PFCP UDP Endpoint pfcp_reports.go HandleReports denial of service |
IV. Related Vulnerabilities
Same product: SMF
- CVE-2026-26025
free5GC SMF crash (nil pointer dereference) on PFCP SessionR - CVE-2026-26024
free5GC SMF crash (nil pointer dereference) on PFCP SessionR - CVE-2026-25501
free5GC SMF crash (nil pointer dereference) on PFCP SessionR - CVE-2026-1684
Free5GC SMF PFCP UDP Endpoint pfcp_reports.go HandleReports - CVE-2026-1682
Free5GC SMF PFCP UDP Endpoint handler.go HandlePfcpAssociati
Same vendor: Free5GC
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free5GC PCF: Memory Leak via CORS Middleware Registration in - CVE-2026-40343
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-404
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Open5GS SMF gsm-build.c gsm_build_pdu_session_establishment_
V. Comments for CVE-2026-1683
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