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🛡️ CVE-2026-33904 — ella-core

🟡 CVSS 6.5 — Medium ✅ No Known Exploit CWE-833 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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

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.

How this vulnerability can be exploited

This issue can be reached from an adjacent network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  • Attack vector: Adjacent network — the attacker has to sit on the same local or logical network.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: None.
  • Integrity impact: None.
  • Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2026-33904 is classified as CWE-833: Deadlock. The product contains multiple threads or executable segments that are waiting for each other to release a necessary lock, resulting in deadlock.

Affected software

CVE-2026-33904 is recorded against 2 packages.

  • ella-core (fixed in 1.7.0)
  • github.com/ellanetworks/core

Timeline and source

Published on 27 March 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com
github.com
github.com

Other advisories for this package

ella-core has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-833: Deadlock) in other software:

Details

Severity MEDIUM
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-833
Public Exploit ✅ No
Source NVD
Published 2026-03-27
Updated 2026-08-20
Modified 2026-06-17

Affected Packages

Software From version Fixed in
ella-core — 1.7.0
github.com/ellanetworks/core — —

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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