CVE-2026-7601

Open5GS AMF gmm-handler.c denial of service

State: Published
Severity: 5.3 Medium
Published: May 2, 2026
Updated: May 4, 2026
Reserved: May 1, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X	VulDB
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C	VulDB
3.0	4.3 Medium	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C	VulDB
2.0	4.0 Medium	AV:N/AC:L/Au:S/C:N/I:N/A:P/E:ND/RL:OF/RC:C	VulDB

Weaknesses

CWE-404 Denial of Service

Affected Products

Product	Versions
Open5GSn/a	2.7.0Affected 2.7.1Affected 2.7.2Affected 2.7.3Affected 2.7.4Affected 2.7.5Affected 2.7.6Affected 2.7.7Not affected

References

VDB-360558 | Open5GS AMF gmm-handler.c denial of servicevdb-entrytechnical-description
VDB-360558 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
Submit #805675 | Open5GS v.2.7.6 Denial of Servicethird-party-advisory
https://github.com/open5gs/open5gs/issues/4321issue-tracking
https://github.com/open5gs/open5gs/commit/ebc66942b6f8f1fab2d640e71cf4e9f1a423b426patch
https://github.com/open5gs/open5gs/releases/tag/v2.7.7patch
https://github.com/open5gs/open5gs/product

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