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CVE-2026-75584

ION-DTN < 4.2.1-a.1 Denial of Service via canonicalizePayloadBlock() Assertion

CVSS 4.0 8.7 HIGHCVSS 3.1 7.5 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-75584

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-75584

Published

ION-DTN

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "defaultStatus": "unaffected",
                    "vendor": "nasa-jpl",
                    "product": "ION-DTN",
                    "packageURL": "pkg:github/nasa-jpl/ION-DTN",
                    "repo": "https://github.com/nasa-jpl/ION-DTN",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "versionType": "semver",
                            "lessThanOrEqual": "4.2.0"
                        },
                        {
                            "status": "unaffected",
                            "version": "4.2.1-a.1",
                            "versionType": "custom"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON