Buffer overflow in Nasa-Jpl Ion-Dtn
CVE-2026-124000
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-h28r-fr59-c79c) (vendor-advisory)
- Fixed Release Tag (release-notes, patch)
- VulnCheck Advisory: ION-DTN 2.1.0-4.2.0 Heap Buffer Under-allocation DoS in amsd (third-party-advisory)
Frequently asked questions
- What is CVE-2026-124000?
- CVE-2026-124000 is a medium-severity vulnerability in Nasa-Jpl Ion-Dtn, classified under Heap-based Buffer Overflow. CVSS score: 5.3/10. Published 2026-11-09.
- How severe is CVE-2026-124000?
- Medium severity. CVSS v3 base score is 5.3 out of 10.