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

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-02 · updated 2026-06-17
Weakness: CWE-404

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.

Affected products

Open5GS: 2.7.0, 2.7.1, 2.7.2, 2.7.3, 2.7.4, 2.7.5 (+1)

References

https://github.com/open5gs/open5gs/
https://github.com/open5gs/open5gs/commit/ebc66942b6f8f1fab2d640e71cf4e9f1a423b426
https://github.com/open5gs/open5gs/issues/4321
https://github.com/open5gs/open5gs/releases/tag/v2.7.7
https://vuldb.com/submit/805675
https://vuldb.com/vuln/360558
https://vuldb.com/vuln/360558/cti

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