{"id":"CVE-2026-44474","aliases":["GHSA-mc29-hmx6-856q","GO-2026-5502"],"url":"https://o3.security/vulnerability/CVE-2026-44474","summary":"Ella Core: Handover failures during concurrent Security Mode Command","details":"## Summary\n\nElla 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).\n\n## Impact\n\nConcurrent 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.\n\n## Fix\n\nElla Core now enforces both rules from §6.9.5.1, blocking concurrent Security Mode Command and N2 handover procedures.","published":"2026-05-27T15:14:49.390Z","modified":"2026-08-12T03:51:26.898380944Z","cvss":{"score":3.7,"severity":"LOW","vector":"CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L"},"epss":{"score":0.00134,"percentile":0.03334,"asOf":"2026-08-14"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/ellanetworks/core","fixedVersion":"1.10.0"}],"fix":null,"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"},{"type":"PACKAGE","url":"https://github.com/ellanetworks/core"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:26.898380944Z"}}