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Vulnerability record · CVE-2026-84484 · published 2 September 2026

CVE-2026-84484: Out-of-bounds read vulnerability

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 LTP link service input port with a truncated SDNV to trigger reads up to nine bytes past buffer boundaries and underflow byte counters.

8.7 CVSS 4.0 High EPSS 0.87% · top 42.9% CWE-125 · Out-of-bounds read Deferred
8.7CVSS 4.0 base score
0.87%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
8References
23 Sep 2026Last modified by NVD

Description

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 LTP link service input port with a truncated SDNV to trigger reads up to nine bytes past buffer boundaries and underflow byte counters.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/nasa-jpl/ION-DTN
https://github.com/nasa-jpl/ION-DTN/blob/ion-open-source-4.1.4/ici/library/ion.c#L1693
https://github.com/nasa-jpl/ION-DTN/blob/ion-open-source-4.1.4/ici/library/platform.c#L1982
https://github.com/nasa-jpl/ION-DTN/commit/d52d22bdd383798712357f86a2778757f740e812
https://github.com/nasa-jpl/ION-DTN/releases/tag/ion-open-source-4.2.0
https://github.com/nasa-jpl/ION-DTN/security/advisories/GHSA-85pw-28vw-2jf7
https://www.vulncheck.com/advisories/ion-dtn-before-4.2.0-out-of-bounds-read-via-decodesdnv
https://github.com/nasa-jpl/ION-DTN/security/advisories/GHSA-85pw-28vw-2jf7

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Source: NIST National Vulnerability Database (record CVE-2026-84484), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.