NASA JPL ION-DTN 3.6.2 through 4.2.0 contains a heap-based buffer overflow in the Network Management daemon (nm_mgr) string-formatting logic that allows a malicious or misconfigured agent to trigger an out-of-bounds write by sending deeply nested AMP payloads that exceed fixed-size buffer allocations through unbounded strcat operations. Attackers can transmit oversized AMP reports, tables, or macros over the UDP CLA/AMP path or trigger the flaw locally via interactive UI rendering to crash nm_mgr and cause a denial of service halting telemetry collection and operator visibility.

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 High

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 High

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
3.6.2 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-gmhw-vmwr-wrxh cve-icon cve-icon
https://www.vulncheck.com/advisories/ion-dtn-heap-buffer-overflow-via-nm-mgr-amp-rendering cve-icon cve-icon
History

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

Type Values Removed Values Added
Weaknesses CWE-120 CWE-122

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

Type Values Removed Values Added
Description NASA JPL ION-DTN 3.6.2 through 4.2.0 contains a heap-based buffer overflow in the Network Management daemon (nm_mgr) string-formatting logic that allows a malicious or misconfigured agent to trigger an out-of-bounds write by sending deeply nested AMP payloads that exceed fixed-size buffer allocations through unbounded strcat operations. Attackers can transmit oversized AMP reports, tables, or macros over the UDP CLA/AMP path or trigger the flaw locally via interactive UI rendering to crash nm_mgr and cause a denial of service halting telemetry collection and operator visibility.
Title ION-DTN 3.6.2-4.2.0 Heap Buffer Overflow via nm_mgr AMP Rendering
Weaknesses CWE-120
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-09T18:46:56.529Z

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

Link: CVE-2026-123999

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-11-09T19:16:47.650

Modified: 2026-11-09T19:16:47.797

Link: CVE-2026-123999

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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

Weaknesses