Out-of-bounds Read in Nasa-Jpl Ion-Dtn
CVE-2026-84484
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.009 (58.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.009 · change: +0.004
Affected products
Weakness classification (CWE)
References
- github.com/nasa-jpl/ION-DTN/security/advisories/GHSA-85pw-28vw-2jf7 (vendor-advisory)
- github.com/nasa-jpl/ION-DTN/commit/d52d22bdd383798712357f86a2778757f740e812 (patch)
- github.com/nasa-jpl/ION-DTN/releases/tag/ion-open-source-4.2.0 (release-notes)
- github.com/nasa-jpl/ION-DTN/blob/ion-open-source-4.1.4/ici/library/platform.c (technical-description)
- github.com/nasa-jpl/ION-DTN/blob/ion-open-source-4.1.4/ici/library/ion.c (technical-description)
- github.com/nasa-jpl/ION-DTN (product)
- www.vulncheck.com/advisories/ion-dtn-before-4.2.0-out-of-bounds-read-via-decode… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-84484?
- CVE-2026-84484 is a high-severity vulnerability in Nasa-Jpl Ion-Dtn, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2026-09-02.
- How severe is CVE-2026-84484?
- High severity. CVSS v3 base score is 7.5 out of 10.