Security advisory

{
  "id": "03881bd76ea7c37d315835069b96d82e29f893f07748eba5755bde4a18aa382b",
  "url": "https://osv.dev/vulnerability/CVE-2021-45462",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-45462",
    "summary": "In Open5GS 2.4.0, a crafted packet from UE can crash SGW-U/UPF.",
    "evidence": "osv:CVE-2021-45462",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-45462",
      "aliases": [
        "CVE-2021-45462"
      ],
      "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/open5gs/open5gs",
              "type": "GIT",
              "events": [
                {
                  "introduced": "27b87c1110d8d5ec0de5e357f561082a0a9482c1"
                },
                {
                  "last_affected": "27b87c1110d8d5ec0de5e357f561082a0a9482c1"
                },
                {
                  "fixed": "a0f2535cb5a29bba6dbbccdb90c74ccd770cc700"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:open5gs:open5gs:2.4.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.4.0"
                      },
                      {
                        "last_affected": "2.4.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "range": [
                      {
                        "fixed": "a0f2535cb5a29bba6dbbccdb90c74ccd770cc700"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.4.0",
            "v2.4.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-45462.json",
            "vanir_signatures": [
              {
                "id": "CVE-2021-45462-108d25fa",
                "digest": {
                  "length": 5852,
                  "function_hash": "66498646289301510419849744843098299667"
                },
                "source": "https://github.com/open5gs/open5gs/commit/a0f2535cb5a29bba6dbbccdb90c74ccd770cc700",
                "target": {
                  "file": "src/upf/gtp-path.c",
                  "function": "_gtpv1_u_recv_cb"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2021-45462-7ee42e6e",
                "digest": {
                  "length": 2842,
                  "function_hash": "221589819375939541502721851894602973056"
                },
                "source": "https://github.com/open5gs/open5gs/commit/a0f2535cb5a29bba6dbbccdb90c74ccd770cc700",
                "target": {
                  "file": "src/smf/gtp-path.c",
                  "function": "_gtpv1_u_recv_cb"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2021-45462-96f5d491",
                "digest": {
                  "length": 4038,
                  "function_hash": "108230382947362361426818551219694048171"
                },
                "source": "https://github.com/open5gs/open5gs/commit/a0f2535cb5a29bba6dbbccdb90c74ccd770cc700",
                "target": {
                  "file": "src/sgwu/gtp-path.c",
                  "function": "_gtpv1_u_recv_cb"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T14:30:20Z"
          }
        }
      ],
      "modified": "2026-10-20T14:30:20.263106108Z",
      "provider": "osv",
      "references": [
        "https://www.trendmicro.com/en_us/research/23/i/attacks-on-5g-infrastructure-from-users-devices.html",
        "https://github.com/open5gs/open5gs/commit/a0f2535cb5a29bba6dbbccdb90c74ccd770cc700"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-45462",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 389232,
  "published_at": "2021-12-23T04:15:09.573+00:00"
}