Paper/Archive/CVE-2026-124001

CVE-2026-124001

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

CVSS 9.2 (CNA)9.2 / 10 × 3027.6 Not in CISA KEV+300.0 No EPSS score.000 × 200.0 No public exploit+100.0 SSVC exploitation: unknown+100.0

Description · from the CVE record

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

ProductAffectedFixed inSource

ION-DTN2.2.1b – 4.2.0–CNA

Scores by source

VulnCheck (CNA)9.2CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

VulnCheck (CNA)8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

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