CVE-2026-75584

High

Description

ION-DTN before 4.2.1-a.1 contains a denial of service vulnerability that allows unauthenticated remote attackers to crash the ION process by sending a BPv7 bundle with a zero-length payload. The canonicalizePayloadBlock() function in bpsec_util.c passes bundle->payload.length to zco_clone() without validating it against zero, causing a failed CHKZERO assertion that triggers sm_Abort() and terminates the process with SIGABRT before any HMAC verification occurs, requiring no valid key or credential to exploit.

SeverityHigh

CVSS7.5

Exploit probability49. percentile0.6%

ProductION-DTN

PublishedSep 10, 2026

First seenSep 10, 2026

Weakness typeCWE-617CWE-617

How to fix

Vendor advisories

github.com/nasa-jpl/ION-DTN/security/advisories/GHSA-9vgc-2r6g-6qwf

Affected products

Product	Affected versions	Fixed in
nasa-jpl ION-DTN	v ≤ 4.2.0	—

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