CVE-2026-124000 ION-DTN 2.1.0-4.2.0 Heap Buffer Under-allocation DoS in amsd
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-124000?
CVE-2026-124000 is a medium-severity vulnerability in nasa-jpl ION-DTN, published on 9 Nov 2026.
Official 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.
Weakness: CWE-122
Which versions are affected by CVE-2026-124000?
How do I fix CVE-2026-124000?
No fix has been published for CVE-2026-124000 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-124000 being exploited?
There is no known exploitation of CVE-2026-124000 in the wild and no public exploit code.
Sources
Also known as GHSA-h28r-fr59-c79c.