CVE-2026-12413

Description

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 still store these in a fixed size array msg_digest.digest[PAYLIMIT]. An off-by-one error in the assertion PASSERT(logger, md->digest_roof < elemsof(md->digest)) causes the daemon to abort. No remote code execution is possible. Any configuration that allows IKEv2 connections that do not set fragmentation=no are vulnerable. IKEv1 is not affected.

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Produits concernés

• The Libreswan Project libreswan
• Libreswan libreswan

Scores CVSS

Faiblesses (CWE)

• CWE-193
• CWE-617

Références

• https://libreswan.org/security/CVE-2026-12413/ Vendor Advisory
• https://libreswan.org/security/CVE-2026-12413/CVE-2026-12413.txt Vendor AdvisoryMitigation

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories