Medium

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

Type: advisorySources: OSV

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.

Products: Not specified
Affected versions: Not specified
Fixed versions: Not specified
CVEs: CVE-2026-33904
Confirmed fixed CVEs: Not specified
Updated in this feed: 3 Nov 2026, 00:58 UTC · Revision 1

Source evidence

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

core-osv · Original source

Published 27 Mar 2026, 20:55 UTC

osv:CVE-2026-33904

Complete source record

{
  "id": "ee555b74eedce6653dfe45ab0a5d1a001e3a394caa98c48f72a7e4c9aea7b1ed",
  "url": "https://osv.dev/vulnerability/CVE-2026-33904",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Ella Core has a Denial of Service via SCTP connection cleanup deadlock",
    "summary": "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.",
    "evidence": "osv:CVE-2026-33904",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-33904",
      "aliases": [
        "CVE-2026-33904",
        "GHSA-9h59-p45g-445h",
        "GO-2026-4874"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ellanetworks/core",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "d406e560f6f1900d9278e703ef7331a87b2ca5e2"
                },
                {
                  "fixed": "999f606c5cae261471d9e3f063d7ecd1bd754076"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:ellanetworks:ella_core:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.7.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "999f606c5cae261471d9e3f063d7ecd1bd754076"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "d406e560f6f1900d9278e703ef7331a87b2ca5e2"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v1.7.0"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.6.0",
            "v1.5.2",
            "v1.5.1",
            "v1.5.0",
            "v1.4.0",
            "v1.3.0",
            "v1.2.0",
            "v1.1.0",
            "v1.0.0",
            "v0.7.0",
            "v0.6.0",
            "v0.5.0",
            "v0.4.2",
            "v0.4.1",
            "v0.4.0",
            "v0.3.1",
            "v0.3.0",
            "v0.2.0",
            "v0.1.0",
            "v0.0.20",
            "v0.0.19",
            "v0.0.18",
            "v0.0.17",
            "v0.0.16",
            "v0.0.15",
            "v0.0.14",
            "v0.0.13",
            "v0.0.12",
            "v0.0.11",
            "v0.0.10",
            "v0.0.9",
            "v0.0.8",
            "v0.0.7",
            "v0.0.6",
            "v0.0.5",
            "v0.0.4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33904.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.991674204Z",
      "provider": "osv",
      "references": [
        "https://github.com/ellanetworks/core/releases/tag/v1.7.0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33904.json",
        "https://github.com/ellanetworks/core/security/advisories/GHSA-9h59-p45g-445h",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-33904",
        "https://github.com/ellanetworks/core/commit/999f606c5cae261471d9e3f063d7ecd1bd754076"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-833"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33904.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-33904",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491378,
  "published_at": "2026-03-27T20:55:18.506+00:00"
}