{"id":"CVE-2026-44474","summary":"Ella Core: Handover failures during concurrent Security Mode Command","details":"Ella Core is a 5G core designed for private networks. Prior to 1.10.0, Ella Core didn't enforce security rules on concurrent running of security procedures defined in TS 33.501 §6.9.5.1 — it could send a NAS Security Mode Command while an N2 handover was still pending (and vice versa). Concurrent Security Mode Command and N2 handover produce a KgNB mismatch between the UE and target gNB, causing the handover to fail. Requires a stalled gNB + re-registration race to trigger. This vulnerability is fixed in 1.10.0.","aliases":["GHSA-mc29-hmx6-856q","GO-2026-5502"],"modified":"2026-08-12T03:51:26.898380944Z","published":"2026-05-27T15:14:49.390Z","related":["openSUSE-SU-2026:21483-1"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-358"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44474.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44474.json"},{"type":"ADVISORY","url":"https://github.com/ellanetworks/core/security/advisories/GHSA-mc29-hmx6-856q"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44474"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ellanetworks/core","events":[{"introduced":"0"},{"fixed":"625555b0abcd5d2f788d35160d099a92f1e8aa67"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.10.0"}],"source":"AFFECTED_FIELD"}}],"versions":["v1.9.1","v1.9.0","v1.8.1","v1.8.0","v1.7.0","v1.6.0","v1.5.2","v1.5.1","v1.5.0","v1.4.0","v1.3.0","v1.2.0","v1.1.0","v1.0.0","v0.7.0","v0.6.0","v0.5.0","v0.4.2","v0.4.1","v0.4.0","v0.3.1","v0.3.0","v0.2.0","v0.1.0","v0.0.20","v0.0.19","v0.0.18","v0.0.17","v0.0.16","v0.0.15","v0.0.14","v0.0.13","v0.0.12","v0.0.11","v0.0.10","v0.0.9","v0.0.8","v0.0.7","v0.0.6","v0.0.5","v0.0.4"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44474.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L"}]}