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CVE-2026-1684— Free5GC SMF PFCP UDP Endpoint pfcp_reports.go HandleReports denial of service

Quick assessment

Affected
Free5GC SMF
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 4.1.0及之前版本存在安全漏洞，该漏洞源于PFCP UDP Endpoint组件中/internal/context/pfcp_reports.go文件的HandleReports函数存在操作不当，可能导致拒绝服务。

CVSS 5.3 · Medium EPSS 0.58% · P46

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-1684

Vulnerability Information
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Vulnerability Title
Free5GC SMF PFCP UDP Endpoint pfcp_reports.go HandleReports denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in Free5GC SMF up to 4.1.0. Affected by this issue is the function HandleReports of the file /internal/context/pfcp_reports.go of the component PFCP UDP Endpoint. The manipulation results in denial of service. The attack can be executed remotely. It is advisable to implement a patch to correct this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不恰当的资源关闭或释放
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 4.1.0及之前版本存在安全漏洞，该漏洞源于PFCP UDP Endpoint组件中/internal/context/pfcp_reports.go文件的HandleReports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

Vendor Product Affected Versions CPE Subscribe
Free5GC SMF 4.0 -

II. Public POCs for CVE-2026-1684

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III. Intelligence Information for CVE-2026-1684

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Patches & Fixes for CVE-2026-1684 (1)

Vendor Advisories for CVE-2026-1684 (1)

Other References for CVE-2026-1684 (1)

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-2026-1683 5.3 MEDIUM Free5GC SMF PFCP handler.go HandlePfcpSessionReportRequest denial of service

IV. Related Vulnerabilities

Same product: SMF
Same vendor: Free5GC
Same weakness: CWE-404

V. Comments for CVE-2026-1684

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