CVE WatchSep 10, 2026

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

CVSS

7.5

High

EPSS

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KEV

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Exploit Today

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0-100

Published: Sep 10, 2026 · Last modified: Sep 10, 2026 · CWE-617

EPSS · 30d

Not enough EPSS history yet.

Technical 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.

Official references

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