CVE-2026-7781 | Open5GS up to 2.7.7 amf-3gpp-access Endpoint /src/udm/nudm-handler.c udm_nudm_uecm_handle_amf_registration_update denial of service (Issue 4420)

A vulnerability, which was classified as problematic, has been found in Open5GS up to 2.7.7. Affected by this issue is the function udm_nudm_uecm_handle_amf_registration_update of the file /src/udm/nudm-handler.c of the component amf-3gpp-access Endpoint. The manipulation leads to denial of service.

This vulnerability is uniquely identified as CVE-2026-7781. The attack is possible to be carried out remotely. Moreover, an exploit is present.

The project was informed of the problem early through an issue report but has not responded yet.