Vulnerability · Published Mar 27, 2026 · Assigned by GitHub_M

CVE-2026-33904Ella Core has a Denial of Service via SCTP connection cleanup deadlock

Medium 6.5

In plain English

A medium-severity security flaw in core from ellanetworks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.2%top 93.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/ellanetworks/core	1.7.0	GHSA-9h59-p45g-445h
Go	github.com/ellanetworks/core	1.7.0	GO-2026-4874

Affected products (as reported)

Vendor	Product	Versions
ellanetworks	core	< 1.7.0

Weakness: CWE-833 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/ellanetworks/core/security/advisories/GHSA-9h59-p45g-445h x_refsource_CONFIRM
https://github.com/ellanetworks/core/commit/999f606c5cae261471d9e3f063d7ecd1bd754076 x_refsource_MISC
https://github.com/ellanetworks/core/releases/tag/v1.7.0 x_refsource_MISC