CVE-2026-33904

MEDIUM

Ella Core has a Denial of Service via SCTP connection cleanup deadlock

Title source: cna
STIX 2.1

Description

Ella Core is a 5G core designed for private networks. Prior to version 1.7.0, a deadlock in the AMF's SCTP notification handler causes the entire AMF control plane to hang until the process is restarted. An attacker with access to the N2 interface can cause Ella Core to hang, resulting in a denial of service for all subscribers. Version 1.7.0 adds deferred Radio cleanup in serveConn SCTP server so that every connection exit path removes the radio. Remove the stale-entry scan from SCTP Notification handling.

Scores

CVSS v3 6.5
EPSS 0.0002
EPSS Percentile 6.8%
Attack Vector ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-833
Status published
Products (3)
ellanetworks/core 0 - 1.7.0Go
ellanetworks/core < 1.7.0
ellanetworks/ella_core < 1.7.0
Published Mar 27, 2026
Tracked Since Mar 29, 2026