NASA-JPL Ion-Dtn prior 4.2.1-a.1 Payload Processing bpsec_util.c canonicalizePayloadBlock payload denial of service

Summaryinfo

A vulnerability identified as critical has been detected in NASA-JPL Ion-Dtn. This vulnerability affects the function canonicalizePayloadBlock of the file bpsec_util.c of the component Payload Processing. Performing a manipulation of the argument payload results in denial of service. This vulnerability is known as CVE-2026-75584. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in NASA-JPL Ion-Dtn. This affects the function canonicalizePayloadBlock of the file bpsec_util.c of the component Payload Processing. The manipulation of the argument payload with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-75584 since 08/18/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 4.2.1-a.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-75456). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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Vendor

• NASA-JPL

Name

• Ion-Dtn

Website

• Product: https://github.com/nasa-jpl/ION-DTN/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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