CVE-2026-44474

LOW

Ella Core: Handover failures during concurrent Security Mode Command

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 3.7
EPSS 0.0013
EPSS Percentile 3.2%
Attack Vector ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-358
Status published
Products (2)
ellanetworks/core 0 - 1.10.0Go
ellanetworks/core < 1.10.0
Published May 27, 2026
Tracked Since May 27, 2026