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.

  • Published Sep 2, 2026
  • CVSS 8.7 high
  • 0.9% chance of exploitation in the next 30 days (EPSS)
  • A fix is available

Affected software

CVE-2026-84484 at the National Vulnerability Database