{"id":"CVE-2026-84484","title":"ION-DTN versions before 4.2.0 contain an out-of-bounds read vulnerability in the decodeSdnv function that allows unauthenticated remote attackers to read memory by sending truncated SDNV values","summary":"ION-DTN versions before 4.2.0 contain an out-of-bounds read vulnerability in the decodeSdnv function that allows unauthenticated remote attackers to read memory by sending truncated SDNV values. Attackers can send a UDP datagram to the L…","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-125"],"published":"2026-09-02","updated":"2026-09-23","sourceUpdated":"2026-09-23T17:17:43.880","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-84484","references":[{"url":"https://github.com/nasa-jpl/ION-DTN","label":"disclosure@vulncheck.com"},{"url":"https://github.com/nasa-jpl/ION-DTN/blob/ion-open-source-4.1.4/ici/library/ion.c#L1693","label":"disclosure@vulncheck.com"},{"url":"https://github.com/nasa-jpl/ION-DTN/blob/ion-open-source-4.1.4/ici/library/platform.c#L1982","label":"disclosure@vulncheck.com"},{"url":"https://github.com/nasa-jpl/ION-DTN/commit/d52d22bdd383798712357f86a2778757f740e812","label":"disclosure@vulncheck.com"},{"url":"https://github.com/nasa-jpl/ION-DTN/releases/tag/ion-open-source-4.2.0","label":"disclosure@vulncheck.com"},{"url":"https://github.com/nasa-jpl/ION-DTN/security/advisories/GHSA-85pw-28vw-2jf7","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/ion-dtn-before-4.2.0-out-of-bounds-read-via-decodesdnv","label":"disclosure@vulncheck.com"},{"url":"https://github.com/nasa-jpl/ION-DTN/security/advisories/GHSA-85pw-28vw-2jf7","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00477,"epssPercentile":0.4036,"ingestedAt":"2026-09-23T17:28:14.819Z","slug":"CVE-2026-84484","body":"## Overview\n\nION-DTN versions before 4.2.0 contain an out-of-bounds read vulnerability in the decodeSdnv function that allows unauthenticated remote attackers to read memory by sending truncated SDNV values. Attackers can send a UDP datagram to the LTP link service input port with a truncated SDNV to trigger reads up to nine bytes past buffer boundaries and underflow byte counters.\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":[]}