NASA JPL ION-DTN: Heap-based buffer overflow in Network Management daemon (CVE-2026-123999)
NASA JPL ION-DTN versions 3.6.2 through 4.2.0 contain a heap-based buffer overflow in the Network Management daemon (nm_mgr) that can cause a denial of service.
CVE search metadata
CVE search record: CVE-2026-123999. Severity: high. CVSS: 7.5. KEV: no. Product: ION-DTN (3.6.2 through 4.2.0). Brief: NASA JPL ION-DTN: Heap-based buffer overflow in Network Management daemon (CVE-2026-123999). Brief link: https://feed.craftedsignal.io/briefs/2026-11-nasa-jpl-ion-dtn-overflow/
Triage facts
Revision 1- Applicability
- ION-DTN (3.6.2 through 4.2.0)
- Evidence
- Unknown
- Severity
- Low
- Sources
- 1 public source
- Freshness
- Revision 1Nov 9, 19:51 UTC
- Vulnerabilities
- 1 CVE
- Source quality
- A2Roughly even chance
NASA JPL ION-DTN versions 3.6.2 through 4.2.0 contain a heap-based buffer overflow in the Network Management daemon (nm_mgr) string-formatting logic. A malicious or misconfigured agent can trigger an out-of-bounds write via 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.