GitHub Advisoryadvisory · Go
GHSA-mc29-hmx6-856q Ella Core has handover failures during concurrent Security Mode Command
LOW
Official page ↗
- Aliases
- CVE-2026-44474
- Ecosystem
- Go
- Packages
- github.com/ellanetworks/core
- Severity
- Low
- CVSS vector
- CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L
- Weaknesses
- CWE-358
- Reviewed
- 2026-05-11
Affected packages
• Go github.com/ellanetworks/core: < 1.10.0 → fixed in 1.10.0
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.
Related
Alias · CVE (1)
- CVE-2026-44474 Ella Core is a 5G core designed for private networks. vulnerability
Weakness · CWE (1)
- CWE-358 Improperly Implemented Security Check for Standard weakness