CVE-2026-124001 ION-DTN 2.2.1b-4.2.0 Integer Overflow Heap Corruption via DGR
CriticalCVSS 9.2
- Published
- Updated
- Exploit status
- No public exploit known
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.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nasa-jpl/ion-dtn | >= 2.2.1b, <= 4.2.0 | No fix listed |
References
- GitHub Security Advisory (GHSA-rcqq-5qmv-7fxp) vendor-advisory
- Fixed Release Tag patch release-notes
- VulnCheck Advisory: ION-DTN 2.2.1b-4.2.0 Integer Overflow Heap Corruption via DGR third-party-advisory