CVE-2026-44474
Ella Core has handover failures during concurrent Security Mode Command
Description
## Summary 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). ## Impact 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. ## Fix Ella Core now enforces both rules from §6.9.5.1, blocking concurrent Security Mode Command and N2 handover procedures.
How to fix CVE-2026-44474
To remediate CVE-2026-44474, upgrade the affected package to a fixed version below.
- —upgrade to 1.10.0 or later
Is CVE-2026-44474 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.10.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | LOW3.7 | CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L |