CVE-2026-123999 ION-DTN 3.6.2-4.2.0 Heap Buffer Overflow via nm_mgr AMP Rendering
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-123999?
CVE-2026-123999 is a high-severity vulnerability in nasa-jpl ION-DTN, published on 9 Nov 2026.
Official description
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.
Weakness: CWE-122
Which versions are affected by CVE-2026-123999?
How do I fix CVE-2026-123999?
No fix has been published for CVE-2026-123999 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-123999 being exploited?
There is no known exploitation of CVE-2026-123999 in the wild and no public exploit code.
Sources
Also known as GHSA-gmhw-vmwr-wrxh.