Security advisory

{
  "id": "155f53f22c0a5de5bbc83cc9e7c48156961b13e8e9cf2ae7fb24b2384a114425",
  "url": "https://osv.dev/vulnerability/CVE-2025-56394",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2025-56394",
    "summary": "Free5gc 4.0.1 is vulnerable to Buffer Overflow. The AMF incorrectly validates the 5GS mobile identity, resulting in slice reference overflow.",
    "evidence": "osv:CVE-2025-56394",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-56394",
      "aliases": [
        "CVE-2025-56394"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/free5gc/free5gc",
              "type": "GIT",
              "events": [
                {
                  "introduced": "228ac5f7b8b0c3d160bccb3470901b3e87e756c9"
                },
                {
                  "last_affected": "228ac5f7b8b0c3d160bccb3470901b3e87e756c9"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:free5gc:free5gc:4.0.1:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.0.1"
                      },
                      {
                        "last_affected": "4.0.1"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.0.1",
            "v4.0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-56394.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:27.418926630Z",
      "provider": "osv",
      "references": [
        "https://gist.github.com/DDGod2025/532691e3e2db9b47c67c3d153c026e62",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/56xxx/CVE-2025-56394.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-56394",
        "https://github.com/free5gc/free5gc/issues/690"
      ],
      "provider_metadata": {
        "cna_assigner": "mitre",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/56xxx/CVE-2025-56394.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-56394",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 493697,
  "published_at": "2025-09-23T00:00:00+00:00"
}