What is CVE-2026-12413?

CVE-2026-12413 is a high-severity vulnerability in The Libreswan Project, classified under Off-by-one Error. CVSS score: 7.5/10. Published 2026-07-02.

How severe is CVE-2026-12413?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in The Libreswan Project

CVE-2026-12413

An invalidly formatted IKEv2 fragment causes the Libreswan pluto daemon to crash and restart. Continued exploitation would cause a denial of service. The function reassemble_v2_incoming_fragments() would ignore unknown outer payloads but s…

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.

Affected products

The Libreswan Project — versions 4.6, 5.3.1

Weakness classification (CWE)

CWE-193 — Off-by-one Error
CWE-617 — Reachable Assertion

References

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Frequently asked questions

What is CVE-2026-12413?: CVE-2026-12413 is a high-severity vulnerability in The Libreswan Project, classified under Off-by-one Error. CVSS score: 7.5/10. Published 2026-07-02.
How severe is CVE-2026-12413?: High severity. CVSS v3 base score is 7.5 out of 10.