CVE-2026-33904

MEDIUM6.5EPSS 0.02%

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

Published: 3/26/2026Modified: 4/2/2026

Also known as:GHSA-9h59-p45g-445hGO-2026-4874

Description

## Summary A deadlock in the AMF's SCTP notification handler causes the entire AMF control plane to hang until the process is restarted. ## Impact An attacker with access to the N2 interface can cause Ella Core to hang, resulting in a denial of service for all subscribers. ## Fix Add 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 (2)

Go/github.com/ellanetworks/corefrom 0, < 1.7.0
Go/github.com/ellanetworks/corefrom 0, < 1.7.0

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	MEDIUM6.5	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References (5)

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-33904
PATCHhttps://github.com/ellanetworks/core
WEBhttps://github.com/ellanetworks/core/commit/999f606c5cae261471d9e3f063d7ecd1bd754076
WEBhttps://github.com/ellanetworks/core/releases/tag/v1.7.0
WEBhttps://github.com/ellanetworks/core/security/advisories/GHSA-9h59-p45g-445h