{"id":"CVE-2026-124000","published":"2026-11-09T19:16:47.843","lastModified":"2026-11-09T23:17:17.870","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.","cvssScore":5.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cwes":["CWE-122"],"vendors":[],"products":[],"references":[{"url":"https://github.com/nasa-jpl/ION-DTN/releases/tag/ion-open-source-4.2.1-a.2","tags":[]},{"url":"https://github.com/nasa-jpl/ION-DTN/security/advisories/GHSA-h28r-fr59-c79c","tags":[]},{"url":"https://www.vulncheck.com/advisories/ion-dtn-heap-buffer-under-allocation-dos-in-amsd","tags":[]}],"exploitRefs":[{"url":"https://github.com/nasa-jpl/ION-DTN/releases/tag/ion-open-source-4.2.1-a.2","tags":[]},{"url":"https://github.com/nasa-jpl/ION-DTN/security/advisories/GHSA-h28r-fr59-c79c","tags":[]}],"hasPoc":true,"ai":null}