CVE-2026-44474

Ella Core: Handover failures during concurrent Security Mode Command

Published May 27, 2026 CVSS 3.1 · 3.7 Low EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-mc29-hmx6-856q Ella Core has handover failures during concurrent Security Mode Command
History
Type Values Removed Values Added
First Time appeared Ellanetworks
Ellanetworks core
Vendors & Products Ellanetworks
Ellanetworks core
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Ella Core: Handover failures during concurrent Security Mode Command
Weaknesses CWE-358
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 27, 2026, 5:23 PM
Reserved
May 6, 2026, 5:18 PM
Status
Deferred
Published
May 27, 2026, 5:16 PM
Modified
Oct 26, 2026, 11:10 AM