ION-DTN < 4.2.1-a.1 Denial of Service via canonicalizePayloadBlock() Assertion

{
  "id": "fb1ee0b7ab206a64f8037c1de603e9abe0304c095e7b9579dbe567fc1a9e44a9",
  "url": "https://osv.dev/vulnerability/CVE-2026-75584",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ION-DTN < 4.2.1-a.1 Denial of Service via canonicalizePayloadBlock() Assertion",
    "summary": "ION-DTN before 4.2.1-a.1 contains a denial of service vulnerability that allows unauthenticated remote attackers to crash the ION process by sending a BPv7 bundle with a zero-length payload. The canonicalizePayloadBlock() function in bpsec_util.c passes bundle->payload.length to zco_clone() without validating it against zero, causing a failed CHKZERO assertion that triggers sm_Abort() and terminates the process with SIGABRT before any HMAC verification occurs, requiring no valid key or credential to exploit.",
    "evidence": "osv:CVE-2026-75584",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-75584",
      "aliases": [
        "CVE-2026-75584",
        "GHSA-9vgc-2r6g-6qwf"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nasa-jpl/ion-dtn",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "4912bf82de7d03a9a11bf5d68614cc002f9ac911"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "4.2.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.2.1-a.1"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "ion-open-source-4.2.0",
            "ion-open-source-4.2.0-a.2",
            "ion-open-source-4.2.0-a.1",
            "ion-open-source-4.1.4",
            "ion-open-source-4.1.4-b.2",
            "ion-open-source-4.1.4-b.1",
            "ion-open-source-4.1.4-a.2",
            "ion-open-source-4.1.4-a.1",
            "ion-open-source-4.1.3",
            "ion-open-source-4.1.2",
            "ion-open-source-4.1.1",
            "ion-4.1.1-release",
            "IOS-4.1.1",
            "ion-3.6.0",
            "ion-3.5.0",
            "ion-3.4.0",
            "ion-3.3.0",
            "ion-3.2.0",
            "ion-3.1.0",
            "ion-3.0.0",
            "ion-2.5.0",
            "ion-2.4.0",
            "ion-2.3.0",
            "ion-2.2.1b",
            "ion-2.2.1",
            "ion-2.2.0",
            "ion-2.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-75584.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.062962490Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75584.json",
        "https://github.com/nasa-jpl/ION-DTN/security/advisories/GHSA-9vgc-2r6g-6qwf",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-75584",
        "https://www.vulncheck.com/advisories/ion-dtn-a-1-denial-of-service-via-canonicalizepayloadblock-assertion",
        "https://github.com/nasa-jpl/ION-DTN"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-617"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75584.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-75584",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491676,
  "published_at": "2026-09-10T13:54:08.218+00:00"
}