Ella Core panics on invalid PDU Session IDs in NGAP messages
Priority LOW 33CWE-129Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-129 and the CVSS impact.
Summary
Ella Core is a 5G core designed for private networks. Versions prior to 1.6.0 panic when processing NGAP messages with invalid PDU Session IDs outside of 1-15. An attacker able to send crafted NGAP messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required. Version 1.6.0 added PDU Session ID validations during NGAP message handling.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00409 35th percentileScored 2026-11-07
Fix Fixed core (ellanetworks): 1.6.0github.com/ellanetworks/core (Go): 1.6.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| ellanetworks | core | before 1.6.0 | 1.6.0 | Patch available | CNA |
| — | github.com/ellanetworks/core (Go) | before 1.6.0 | 1.6.0 | Patch available | GHSA-q669-4gmv-g8mf |
- core Vendorellanetworks Affected before 1.6.0 Fixed in 1.6.0 Patch available CNA
- github.com/ellanetworks/core (Go) Vendor— Affected before 1.6.0 Fixed in 1.6.0 Patch available GHSA-q669-4gmv-g8mf
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:ellanetworks:ella_core:*:*:*:*:*:*:*:* | before 1.6.0 | Vulnerable | ellanetworks |
- cpe:2.3:a:ellanetworks:ella_core:*:*:*:*:*:*:*:* Versions before 1.6.0 Vulnerable ·ellanetworks
Remediation
- Fix · CNA core (ellanetworks) Fixed in 1.6.0
- Fix · GHSA-q669-4gmv-g8mf github.com/ellanetworks/core (Go) Fixed in 1.6.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-33281
- 2026-10-03 Alias added: GHSA-q669-4gmv-g8mf
References
More ellanetworks Ella Core vulnerabilities
- TI-2026-24847 Ella Core: Unauthenticated AMF DoS via malformed InitialUEMessage with undersized integrity-protected NAS payload CVSS 3.1HIGH 7.5
- TI-2026-26264 Ella Core has Privilege Escalation via Database Restore by NetworkManager role CVSS 3.1HIGH 7.2
- TI-2026-25694 Ella Core panics on malformed ULNASTransport Message without a Request Type CVSS 3.1HIGH 7.5
- TI-2026-25693 Ella Core panics on malformed NGAP Location Report CVSS 3.1HIGH 7.5
- TI-2026-24848 Ella Core: AMF DoS via malformed PathSwitchRequest with empty NR security capability bitstrings CVSS 3.1HIGH 7.5
- TI-2026-27005 Ella Core Panics Upon NGAP handover failure CVSS 3.1MEDIUM 6.5
Sources
- CVE-2026-33281 · CVE Program
- CVE-2026-33281 · NVD
- FIRST EPSS
- GHSA-q669-4gmv-g8mf · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences