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TI-2026-58061 Aliases CVE-2026-84484GHSA-5vmj-4h65-2fh8

ION-DTN before 4.2.0 Out-of-Bounds Read via decodeSdnv

Priority HIGH 77CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

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

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00867 58th percentileScored 2026-11-07
Fix Fixed ION-DTN (nasa-jpl): 4.2.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nasa-jplION-DTNbefore 4.2.04.2.0Patch availableCNA
  • ION-DTN Vendornasa-jpl Affected before 4.2.0 Fixed in 4.2.0 Patch available CNA

Remediation

  • Fix · CNA ION-DTN (nasa-jpl) Fixed in 4.2.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-84484
  2. 2026-10-03 Alias added: GHSA-5vmj-4h65-2fh8

References

Patch 1

Advisory 1

Other 4

  • TI-2024-36246 Segmentation Fault in `forwardBundle` Function of ION-DTN BPv7 When Destination EID is `dtn:none` (public) CVSS 4.0CRITICAL 9.2
  • TI-2026-52897 ION-DTN < 4.2.1-a.1 Denial of Service via canonicalizePayloadBlock() Assertion CVSS 4.0HIGH 8.7
  • TI-2024-36245 Improper Initialization of `imc` Scheme Leading to `SIGABRT` in ION-DTN BPv7 CVSS 4.0CRITICAL 9.2
  • TI-2025-38260 NASA ION-DTN BPv7 4.1.3s Uncontrolled Memory Allocation that leads to Denial-of-Service CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences