CVE-2026-33904: CWE-833: Deadlock in ellanetworks core
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.
AI Analysis
Technical Summary
Ella Core, a 5G core for private networks, contains a deadlock vulnerability (CWE-833) in its AMF SCTP notification handler in versions before 1.7.0. This deadlock halts the AMF control plane, requiring a process restart to recover. The vulnerability can be triggered by an attacker with access to the N2 interface, resulting in denial of service for all subscribers. The fix introduced in version 1.7.0 involves deferred radio cleanup in the SCTP server's connection exit path and removal of stale-entry scans from SCTP notification handling, preventing the deadlock condition.
Potential Impact
The vulnerability causes a denial of service by hanging the AMF control plane, disrupting service for all subscribers relying on the affected Ella Core instance. There is no impact on confidentiality or integrity, but availability is severely affected until the process is manually restarted.
Mitigation Recommendations
Upgrade to Ella Core version 1.7.0 or later, where the deadlock issue in the AMF SCTP notification handler has been fixed. Since no patch links or vendor advisory are provided, confirm patch availability with the vendor before upgrading. Until patched, restrict or monitor access to the N2 interface to prevent exploitation.
CVE-2026-33904: CWE-833: Deadlock in ellanetworks core
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Ella Core, a 5G core for private networks, contains a deadlock vulnerability (CWE-833) in its AMF SCTP notification handler in versions before 1.7.0. This deadlock halts the AMF control plane, requiring a process restart to recover. The vulnerability can be triggered by an attacker with access to the N2 interface, resulting in denial of service for all subscribers. The fix introduced in version 1.7.0 involves deferred radio cleanup in the SCTP server's connection exit path and removal of stale-entry scans from SCTP notification handling, preventing the deadlock condition.
Potential Impact
The vulnerability causes a denial of service by hanging the AMF control plane, disrupting service for all subscribers relying on the affected Ella Core instance. There is no impact on confidentiality or integrity, but availability is severely affected until the process is manually restarted.
Mitigation Recommendations
Upgrade to Ella Core version 1.7.0 or later, where the deadlock issue in the AMF SCTP notification handler has been fixed. Since no patch links or vendor advisory are provided, confirm patch availability with the vendor before upgrading. Until patched, restrict or monitor access to the N2 interface to prevent exploitation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-24T15:41:47.491Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69c6f3473c064ed76ff6188d
Added to database: 3/27/2026, 9:14:47 PM
Last enriched: 4/4/2026, 10:55:16 AM
Last updated: 5/12/2026, 1:38:34 AM
Views: 161
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