CVE-2026-123999: high-severity vulnerability in nasa-jpl ION-DTN
ION-DTN 3.6.2-4.2.0 Heap Buffer Overflow via nm_mgr AMP Rendering
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.5%
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.
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
Affected products
nasa-jpl · ION-DTNRelated CVEs — nasa-jpl ION-DTN
In the same product, most dangerous first.
CVE-2026-84484HIGHION-DTN before 4.2.0 Out-of-Bounds Read via decodeSdnvEPSS 0.9%CVE-2026-75584HIGHION-DTN < 4.2.1-a.1 Denial of Service via canonicalizePayloadBlock() AssertionEPSS 0.6%CVE-2026-124001CRITICALION-DTN 2.2.1b-4.2.0 Integer Overflow Heap Corruption via DGREPSS 0.5%CVE-2026-124000MEDIUMION-DTN 2.1.0-4.2.0 Heap Buffer Under-allocation DoS in amsdEPSS 0.5%CVE-2024-54129CRITICALImproper Initialization of `imc` Scheme Leading to `SIGABRT` in ION-DTN BPv7EPSS 0.4%CVE-2024-54130CRITICALSegmentation Fault in `forwardBundle` Function of ION-DTN BPv7 When Destination EID is `dtn:none` (public)EPSS 0.4%