CVE-2026-124001

HIGH 8.1

ION-DTN 2.2.1b-4.2.0 Integer Overflow Heap Corruption via DGR

CVSS Score

8.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-190 CWE-787
Vendor	nasa-jpl
Product	ion-dtn
Published	Nov 9, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

nasa-jpl / ION-DTN

2.2.1b ≤ 4.2.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/nasa-jpl/ION-DTN/security/advisories/GHSA-rcqq-5qmv-7fxp github.com: https://github.com/nasa-jpl/ION-DTN/releases/tag/ion-open-source-4.2.1-a.2 vulncheck.com: https://www.vulncheck.com/advisories/ion-dtn-1b-integer-overflow-heap-corruption-via-dgr

Credits

SecMate (secmate.dev)