{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.2.2"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "CPE_RANGE"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8b0f4445fc931638fb624463ce3572a203517679"
            }
          ],
          "repo": "https://github.com/free5gc/free5gc",
          "type": "GIT"
        },
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "f110517b1189801950b50668a593398687049074"
            }
          ],
          "repo": "https://github.com/free5gc/nef",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-rxrq-fv76-26pr"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-20",
      "CWE-617",
      "CWE-755"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44319.json"
  },
  "details": "free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF terminates the entire process when a stored PFD-subscription notifyUri cannot be reached. In PfdChangeNotifier.FlushNotifications(), the notifier calls NnefPFDmanagementNotify(...) and on any delivery error invokes logger.PFDManageLog.Fatal(err), which is os.Exit(1)-equivalent in Go. An attacker who can create a PFD subscription with an attacker-chosen notifyUri and then trigger a PFD change can deterministically kill NEF on the asynchronous delivery attempt -- the process exits with status 1, dropping NEF's entire SBI surface until restart. This vulnerability is fixed in 4.2.2.",
  "id": "CVE-2026-44319",
  "modified": "2026-08-12T03:51:40.264522511Z",
  "published": "2026-05-27T15:49:20.934Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44319.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/free5gc/free5gc/security/advisories/GHSA-rxrq-fv76-26pr"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44319"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/free5gc/free5gc/issues/924"
    },
    {
      "type": "FIX",
      "url": "https://github.com/free5gc/nef/commit/f110517b1189801950b50668a593398687049074"
    },
    {
      "type": "FIX",
      "url": "https://github.com/free5gc/nef/pull/25"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "free5GC: NEF crashes via logger.Fatal on PFD notification delivery failure (attacker-controlled notifyUri)"
}