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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
nasa-jpl ION-DTN unaffected
Version Status Constraints
2.1.0 affected ≤ 4.2.0
4.2.1-a.2 unaffected —

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Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

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

Mon, 09 Nov 2026 19:00:00 +0000

Type Values Removed Values Added
References

Mon, 09 Nov 2026 18:45:00 +0000

Type Values Removed Values Added
Description 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.
Title ION-DTN 2.1.0-4.2.0 Heap Buffer Under-allocation DoS in amsd
Weaknesses CWE-122
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-09T18:45:46.277Z

Reserved: 2026-11-06T18:38:38.543Z

Link: CVE-2026-124000

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-11-09T19:16:47.843

Modified: 2026-11-09T19:16:47.963

Link: CVE-2026-124000

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-09T19:30:15Z

Weaknesses