CVE-2026-44474
Ella Core: Handover failures during concurrent Security Mode Command
- State
- Published
- Severity
- 3.7 Low
- Published
- May 27, 2026
- Updated
- May 27, 2026
- Reserved
- May 6, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 3.7 Low | CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L | GitHub_M |
Weaknesses
- CWE-358 Improperly Implemented Security Check for Standard
Affected Products
| Product | Versions |
|---|---|
coreellanetworks |
|
References
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