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CVE-2026-7601— Open5GS AMF gmm-handler.c denial of service

Quick assessment

Affected
n/a Open5GS
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.

Open5GS是Open5GS开源的一个 5G Core 和 Epc 的 C 语言开源实现，即 Lte/Nr 网络的核心网络。 Open5GS 2.7.6及之前版本存在安全漏洞，该漏洞源于AMF组件中src/amf/gmm-handler.c文件的未知函数对参数reg_type操作不当，可能导致拒绝服务。

CVSS 4.3 · Medium EPSS 0.53% · P43

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 8

VendorProduct Version RangeStatus
n/a Open5GS 2.7.0 affected
2.7.1 affected
2.7.2 affected
2.7.3 affected
2.7.4 affected
2.7.5 affected
2.7.6 affected
2.7.7 unaffected
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I. Basic Information for CVE-2026-7601

Vulnerability Information
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Vulnerability Title
Open5GS AMF gmm-handler.c denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been found in Open5GS up to 2.7.6. Affected is an unknown function of the file src/amf/gmm-handler.c of the component AMF. The manipulation of the argument reg_type leads to denial of service. The attack is possible to be carried out remotely. Upgrading to version 2.7.7 is able to address this issue. The identifier of the patch is ebc66942b6f8f1fab2d640e71cf4e9f1a423b426. It is advisable to upgrade the affected component.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/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
Open5GS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open5GS是Open5GS开源的一个 5G Core 和 Epc 的 C 语言开源实现，即 Lte/Nr 网络的核心网络。 Open5GS 2.7.6及之前版本存在安全漏洞，该漏洞源于AMF组件中src/amf/gmm-handler.c文件的未知函数对参数reg_type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
- Open5GS 2.7.0 cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-7601

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III. Intelligence Information for CVE-2026-7601

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Patches & Fixes for CVE-2026-7601 (2)

Vendor Pages for CVE-2026-7601 (1)

Same Patch Batch · n/a · 2026-05-02 · 5 CVEs total

CVE-2026-7605 6.3 MEDIUM JeecgBoot uploadImgByHttpEndpoint CommonController.java HttpFileToMultipartFileUtil.downlo
CVE-2026-7604 6.3 MEDIUM JeecgBoot OpenApi Service OpenApiController.java OpenApiController.call server-side reques
CVE-2026-7603 6.3 MEDIUM JeecgBoot LoadFile Endpoint FileDownloadUtils.jav checkPathTraversalBatch server-side requ
CVE-2026-7602 6.3 MEDIUM JeecgBoot FillRuleUtil edit improper authorization

IV. Related Vulnerabilities

Same product: Open5GS
Same vendor: n/a
Same weakness: CWE-404

V. Comments for CVE-2026-7601

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