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CVE-2026-1973— Free5GC SMF establishPfcpSession null pointer dereference

Quick assessment

Affected
n/a Free5GC
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及之前版本存在代码问题漏洞，该漏洞源于SMF组件中establishPfcpSession函数存在缺陷，可能导致空指针取消引用。

CVSS 5.3 · Medium EPSS 0.56% · P44

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-1973

Vulnerability Information
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Vulnerability Title
Free5GC SMF establishPfcpSession null pointer dereference
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was determined in Free5GC up to 4.1.0. The impacted element is the function establishPfcpSession of the component SMF. Executing a manipulation can lead to null pointer dereference. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. It is best practice to apply a patch to resolve 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
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
free5GC 代码问题漏洞
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及之前版本存在代码问题漏洞，该漏洞源于SMF组件中establishPfcpSession函数存在缺陷，可能导致空指针取消引用。
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 4.0 cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-1973

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III. Intelligence Information for CVE-2026-1973

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Vendor Advisories for CVE-2026-1973 (2)

Same Patch Batch · n/a · 2026-02-06 · 10 CVEs total

CVE-2026-2062 5.3 MEDIUM Open5GS PGW S5U Address sgwc_sxa_handle_session_modification_response null pointer derefer
CVE-2026-1979 5.3 MEDIUM mruby JMPNOT-to-JMPIF Optimization vm.c mrb_vm_exec use after free
CVE-2026-1976 5.3 MEDIUM Free5GC SMF SessionDeletionResponse null pointer dereference
CVE-2026-1975 5.3 MEDIUM Free5GC pfcp_reports.go identityTriggerType null pointer dereference
CVE-2026-1974 5.3 MEDIUM Free5GC SMF datapath.go ResolveNodeIdToIp denial of service
CVE-2026-1998 3.3 LOW micropython runtime.c mp_import_all memory corruption
CVE-2026-1991 3.3 LOW libuvc UVC Descriptor device.c uvc_scan_streaming null pointer dereference
CVE-2026-1990 3.3 LOW oatpp Type.hpp ObjectWrapper null pointer dereference
CVE-2025-70963 GoPhish 安全漏洞

IV. Related Vulnerabilities

Same product: Free5GC
Same vendor: n/a
Same weakness: CWE-476

V. Comments for CVE-2026-1973

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