CVE-2026-124001 ION-DTN 2.2.1b-4.2.0 Integer Overflow Heap Corruption via DGR
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-124001?
CVE-2026-124001 is a critical vulnerability in nasa-jpl ION-DTN, published on 9 Nov 2026.
Official description
NASA JPL ION-DTN 2.2.1b through 4.2.0 contains an integer overflow vulnerability in the Datagram Retransmission (DGR) convergence layer that allows attackers to corrupt heap memory by sending a maliciously crafted 64-bit svcDataLength value that wraps a 32-bit allocation size calculation. Attackers can exploit the dgr_receive API's unchecked memcpy operation using synthetic datagrams or DGR traffic over internal IPC or custom transports to trigger an out-of-bounds write, leading to denial of service or potential remote code execution.
Which versions are affected by CVE-2026-124001?
How do I fix CVE-2026-124001?
No fix has been published for CVE-2026-124001 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-124001 being exploited?
There is no known exploitation of CVE-2026-124001 in the wild and no public exploit code.
Sources
Also known as GHSA-rcqq-5qmv-7fxp.