Vulnerability in Nasa-Jpl Ion-Dtn
CVE-2026-75584
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (48.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/nasa-jpl/ION-DTN/security/advisories/GHSA-9vgc-2r6g-6qwf (vendor-advisory)
- www.vulncheck.com/advisories/ion-dtn-a-1-denial-of-service-via-canonicalizepayl… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-75584?
- CVE-2026-75584 is a high-severity vulnerability in Nasa-Jpl Ion-Dtn, classified under Reachable Assertion. CVSS score: 7.5/10. Published 2026-09-10.
- How severe is CVE-2026-75584?
- High severity. CVSS v3 base score is 7.5 out of 10.