CVE-2026-124000

MEDIUM 5.3

ION-DTN 2.1.0-4.2.0 Heap Buffer Under-allocation DoS in amsd

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

NASA JPL ION-DTN 2.1.0 through 4.2.0 contains a heap buffer under-allocation vulnerability in the Asynchronous Message Service daemon (amsd) that allows a rogue or misconfigured peer to trigger an out-of-bounds write by sending crafted Meta-AMS (MAMS) configuration management messages that are processed without cryptographic authentication. Attackers can exploit the insufficient buffer size calculation for the internal state-event object to crash the active Configuration Server thread, causing a denial of service and potentially destabilizing subsequent shared-memory allocations in amsd.

CWE	CWE-122
Vendor	nasa-jpl
Product	ion-dtn
Published	Nov 9, 2026
Last Updated	Nov 9, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Affected Versions

nasa-jpl / ION-DTN

2.1.0 ≤ 4.2.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/nasa-jpl/ION-DTN/security/advisories/GHSA-h28r-fr59-c79c github.com: https://github.com/nasa-jpl/ION-DTN/releases/tag/ion-open-source-4.2.1-a.2 vulncheck.com: https://www.vulncheck.com/advisories/ion-dtn-heap-buffer-under-allocation-dos-in-amsd

Credits

SecMate (secmate.dev)