{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "26.02"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "e1a2e2709210d309458c3d77f98d50dec26c0df0"
            }
          ],
          "repo": "https://github.com/riebl/vanetza",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-q9fq-3rx9-7xcv"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-248"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44905.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "e1a2e2709210d309458c3d77f98d50dec26c0df0"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Vanetza is an open-source implementation of the ETSI C-ITS protocol suite. In 26.02 and earlier, a denial-of-service vulnerability was identified in the cryptographic verification pipeline of Vanetza. When processing incoming V2X messages, the ASN.1 decoder accepts the structure as syntactically valid. However, this reveals a logic-based protocol failure where semantic constraints on specific fields are only strictly enforced during OER re-encoding. Specifically, if a crafted packet contains a certificate where the Psid (Provider Service Identifier) sub-type violates subtype constraints (e.g., out-of-range or invalid CHOICE variant), it is accepted during initial parsing, where subtype constraints are not enforced. Later, when StraightVerifyService attempts to calculate a message hash for cryptographic verification, it must re-encode the signing certificate. The underlying ASN.1 wrapper (asn1c_wrapper.cpp) detects the semantic violation during encoding and raises a std::runtime_error. This exception is not caught within the encoding path and propagates to std::terminate, resulting in immediate process termination. This vulnerability is fixed with commit e1a2e2709210d309458c3d77f98d50dec26c0df0.",
  "id": "CVE-2026-44905",
  "modified": "2026-07-08T05:36:45.378037712Z",
  "published": "2026-05-26T21:18:33.445Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44905.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/riebl/vanetza/security/advisories/GHSA-q9fq-3rx9-7xcv"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44905"
    },
    {
      "type": "FIX",
      "url": "https://github.com/riebl/vanetza/commit/e1a2e2709210d309458c3d77f98d50dec26c0df0"
    }
  ],
  "schema_version": "1.7.5",
  "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": "Vanetza: Remote Denial of Service via Uncaught OER Encoding Exception in Cryptographic Verification"
}