{"id":"CVE-2026-7601","summary":"Open5GS AMF gmm-handler.c denial of service","details":"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.","modified":"2026-08-12T16:09:20.522772Z","published":"2026-05-02T02:00:17.083Z","database_specific":{"cwe_ids":["CWE-404"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/7xxx/CVE-2026-7601.json","unresolved_ranges":[{"extracted_events":[{"introduced":"2.7.3"},{"last_affected":"2.7.3"},{"introduced":"2.7.4"},{"last_affected":"2.7.4"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"VulDB"},"references":[{"type":"WEB","url":"https://github.com/open5gs/open5gs/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/7xxx/CVE-2026-7601.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-7601"},{"type":"ADVISORY","url":"https://vuldb.com/submit/805675"},{"type":"ADVISORY","url":"https://vuldb.com/vuln/360558"},{"type":"REPORT","url":"https://github.com/open5gs/open5gs/issues/4321"},{"type":"REPORT","url":"https://vuldb.com/vuln/360558/cti"},{"type":"FIX","url":"https://github.com/open5gs/open5gs/commit/ebc66942b6f8f1fab2d640e71cf4e9f1a423b426"},{"type":"FIX","url":"https://github.com/open5gs/open5gs/releases/tag/v2.7.7"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/open5gs/open5gs","events":[{"introduced":"83e35bb2de7e67646fdba849580184422b10006a"},{"fixed":"ebc66942b6f8f1fab2d640e71cf4e9f1a423b426"},{"fixed":"318eeb49a7dcdff733dec60e02d9c60aefca2fb9"}],"database_specific":{"extracted_events":[{"introduced":"2.7.0"},{"last_affected":"2.7.0"},{"introduced":"2.7.1"},{"last_affected":"2.7.1"},{"introduced":"2.7.2"},{"last_affected":"2.7.2"},{"introduced":"2.7.5"},{"last_affected":"2.7.5"},{"introduced":"2.7.6"},{"last_affected":"2.7.6"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["2.7.0","2.7.1","2.7.2","2.7.5","2.7.6","v2.7.2","v2.7.1","v2.7.0"],"database_specific":{"vanir_signatures_modified":"2026-08-12T16:09:20Z","vanir_signatures":[{"deprecated":false,"digest":{"threshold":0.9,"line_hashes":["168859358908925507022421406010512337001","134178606328778763080055635997172672947","251605416631586131557720201768193813020","64052140063314894877704142619931198894","213353117923421971599284275802919035419","218837441176161442925726856859436654852","117286304402717804332951855844380041029","103567935308531796029666875594090477226","1910423188555810170027382516819142768","245648404794723954423236354400708268221","135342396680716065880325567040996083854","111089799624746461995486199787579222493","3373064811493054650546810625327751689","34331782201313977202051911933566609554","181945406785680878609371334095321103345"]},"id":"CVE-2026-7601-6527a828","signature_type":"Line","signature_version":"v1","source":"https://github.com/open5gs/open5gs/commit/ebc66942b6f8f1fab2d640e71cf4e9f1a423b426","target":{"file":"src/amf/gmm-handler.c"}},{"id":"CVE-2026-7601-855ac560","signature_type":"Function","signature_version":"v1","source":"https://github.com/open5gs/open5gs/commit/ebc66942b6f8f1fab2d640e71cf4e9f1a423b426","target":{"file":"src/amf/namf-build.c","function":"amf_namf_comm_build_ue_context_transfer"},"deprecated":false,"digest":{"function_hash":"172102098920687939762285197458711856339","length":883}},{"id":"CVE-2026-7601-a4b9e70d","signature_type":"Function","signature_version":"v1","source":"https://github.com/open5gs/open5gs/commit/ebc66942b6f8f1fab2d640e71cf4e9f1a423b426","target":{"file":"src/amf/gmm-handler.c","function":"gmm_handle_registration_request"},"deprecated":false,"digest":{"function_hash":"213325110519951392793000482360974791694","length":6536}},{"target":{"file":"src/amf/namf-build.c"},"deprecated":false,"digest":{"line_hashes":["288625797070489143009189358382880476813","88586633762563255332331857491585612583","303120948113503932221865250202608754236","312126629065195888280000466724166328307"],"threshold":0.9},"id":"CVE-2026-7601-b6309caa","signature_type":"Line","signature_version":"v1","source":"https://github.com/open5gs/open5gs/commit/ebc66942b6f8f1fab2d640e71cf4e9f1a423b426"},{"deprecated":false,"digest":{"function_hash":"179354079607305342630428483608618152725","length":1650},"id":"CVE-2026-7601-cb63a961","signature_type":"Function","signature_version":"v1","source":"https://github.com/open5gs/open5gs/commit/ebc66942b6f8f1fab2d640e71cf4e9f1a423b426","target":{"file":"src/amf/gmm-handler.c","function":"gmm_registration_request_from_old_amf"}}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-7601.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}