Free5GC SMF establishPfcpSession null pointer dereference

{
  "id": "3572ad3541d805ef7522c2ccb0aee440826148b9cad54f527da0a541abede115",
  "url": "https://osv.dev/vulnerability/CVE-2026-1973",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Free5GC SMF establishPfcpSession null pointer dereference",
    "summary": "A vulnerability was determined in Free5GC up to 4.1.0. The impacted element is the function establishPfcpSession of the component SMF. Executing a manipulation can lead to null pointer dereference. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. It is best practice to apply a patch to resolve this issue.",
    "evidence": "osv:CVE-2026-1973",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-1973",
      "aliases": [
        "CVE-2026-1973"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/free5gc/free5gc",
              "type": "GIT",
              "events": [
                {
                  "introduced": "909d7d46527c6570c153896fa58020255a0e1ca8"
                },
                {
                  "last_affected": "de6bdb7a0d5963266c893cca59c86f55df348f57"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "4.0"
                      },
                      {
                        "last_affected": "4.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "4.1.0"
                      },
                      {
                        "last_affected": "4.1.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "cpe": "cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "4.1.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.0",
            "4.1.0",
            "v4.1.0",
            "v4.0.1",
            "v4.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-1973.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:28.788857169Z",
      "provider": "osv",
      "references": [
        "https://github.com/free5gc/free5gc/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1973.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-1973",
        "https://vuldb.com/?id.344495",
        "https://vuldb.com/?submit.743236",
        "https://github.com/free5gc/free5gc/issues/815",
        "https://github.com/free5gc/free5gc/issues/815#issue-3832032062",
        "https://vuldb.com/?ctiid.344495",
        "https://github.com/free5gc/smf/pull/189"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-404",
          "CWE-476"
        ],
        "cna_assigner": "VulDB",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1973.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-1973",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 495716,
  "published_at": "2026-02-06T01:32:08.923+00:00"
}