CVE-2026-84484: Out-of-bounds Read in nasa-jpl ION-DTN
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 v4.0
Score 8.7high
Affected software
nasa-jpl
ION-DTN
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-84484 describes an out-of-bounds read vulnerability in the decodeSdnv function of ION-DTN software versions before 4.2.0. Attackers can exploit this by sending a UDP datagram containing a truncated SDNV value to the LTP link service input port, triggering memory reads beyond the intended buffer limits by up to nine bytes and causing underflow in byte counters. This vulnerability does not require authentication and has a CVSS 4.0 score of 8.7, indicating high severity.
Potential Impact
An unauthenticated remote attacker can read memory beyond buffer boundaries, potentially exposing sensitive information or causing application instability. The vulnerability affects the decodeSdnv function when processing truncated SDNV values sent over UDP to the LTP link service input port. There are no known exploits in the wild at this time.
Mitigation Recommendations
A fix is available in ION-DTN version 4.2.0 and later. Users should upgrade to version 4.2.0 or newer to remediate this vulnerability. No other mitigation guidance is provided.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-01T20:37:00.841Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a977df2acd9273b49968676
Added to database: 09/02/2026, 01:37:54 UTC
Last enriched: 09/25/2026, 02:45:48 UTC
Last updated: 10/15/2026, 06:48:19 UTC
Views: 77
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