CVE-2026-84484: Nasa-Jpl Ion-Dtn

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

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.

Affected products

• Nasa-Jpl Ion-Dtn: before 4.2.0 (fixed in 4.2.0)

Published 2026-09-02. Last modified 2026-09-23.