{"id":"CVE-2026-75584","title":"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","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 bps…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-617"],"vendor":"nasa-jpl","product":"ION-DTN","affected":["ION-DTN <= 4.2.0"],"published":"2026-09-10","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:17:13.063","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-75584","references":[{"url":"https://github.com/nasa-jpl/ION-DTN/security/advisories/GHSA-9vgc-2r6g-6qwf","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/ion-dtn-a-1-denial-of-service-via-canonicalizepayloadblock-assertion","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"epss":0.00428,"epssPercentile":0.36656,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-18T17:11:52.214620Z"},"ingestedAt":"2026-09-10T14:51:56.257Z","slug":"CVE-2026-75584","body":"## Overview\n\nION-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}