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

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Summary

CVECVE-2026-33904
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-27 21:17:26 UTC
Updated2026-03-30 13:26:07 UTC
DescriptionElla 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.000130000 probability, percentile 0.019480000 (date 2026-04-01)

Problem Types: CWE-833 | CWE-833 CWE-833: Deadlock

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Ellanetworks Core affected < 1.7.0 Not specified

References

ReferenceSourceLinkTags
github.com/ellanetworks/core/releases/tag/v1.7.0 [email protected] github.com
github.com/ellanetworks/core/commit/999f606c5cae261471d9e3f063d7ecd1bd75... [email protected] github.com
github.com/ellanetworks/core/security/advisories/GHSA-9h59-p45g-445h [email protected] github.com
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