CVE-2026-75584 json
ION-DTN < 4.2.1-a.1 Denial of Service via canonicalizePayloadBlock() Assertion
published 2mo ago modified last mo. also EUVD-2026-75456 , GHSA-9vgc-2r6g-6qwf
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository nasa-jpl/ION-DTN. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 49%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- nasa-jpl ION-DTN 4.2.1-a.1
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- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- last mo.
Exploit prediction
0.61% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- nasa-jpl ION-DTN
Classification
- Weakness
-
- CWE-617 Reachable Assertion
References
-
github.com
/nasa-jpl/ION-DTN/security/advisories/GHSA-9vgc-2r6g-6qwf
vendor-advisory, advisory
-
vulncheck.com
/advisories/ion-dtn-a-1-denial-of-service-via-canonicalizepayloadblock-assertion
third-party-advisory
Sources
- CVE List CVE-2026-75584
- NVD CVE-2026-75584
- Maintainer advisory GHSA-9vgc-2r6g-6qwf
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of nasa-jpl/ION-DTN published their own advisory on GitHub. Reviewed sources take precedence over it.