Vulnerability in Ellanetworks Core
CVE-2026-33904
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.
EPSS: 0.002 (6.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Ellanetworks Core — versions < 1.7.0
- Ellanetworks Ella_core
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-33904?
- CVE-2026-33904 is a medium-severity vulnerability in Ellanetworks Core, classified under CWE-833. CVSS score: 6.5/10. Published 2026-03-27.
- How severe is CVE-2026-33904?
- Medium severity. CVSS v3 base score is 6.5 out of 10.