{"id":"UBUNTU-CVE-2026-12413","details":"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-\u003edigest_roof \u003c elemsof(md-\u003edigest)) 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.","modified":"2026-07-09T15:15:45Z","published":"2026-07-02T22:16:00Z","upstream":["CVE-2026-12413"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-12413"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-12413"},{"type":"REPORT","url":"https://libreswan.org/security/CVE-2026-12413/CVE-2026-12413.txt"},{"type":"REPORT","url":"https://libreswan.org/security/CVE-2026-12413/"}],"affected":[{"package":{"name":"libreswan","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libreswan?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.20-7build1","3.21-2","3.22-1","3.22-2","3.22-3","3.22-4","3.23-1","3.23-4"],"ecosystem_specific":{"binaries":[{"binary_name":"libreswan","binary_version":"3.23-4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12413.json"}},{"package":{"name":"libreswan","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libreswan?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.29-2","3.29-2build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libreswan","binary_version":"3.29-2build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12413.json"}},{"package":{"name":"libreswan","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libreswan?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.32-3ubuntu3"],"ecosystem_specific":{"binaries":[{"binary_name":"libreswan","binary_version":"3.32-3ubuntu3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12413.json"}},{"package":{"name":"libreswan","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libreswan?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.11-1ubuntu1","4.12-1ubuntu1","4.14-1ubuntu1","4.14-1ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"libreswan","binary_version":"4.14-1ubuntu2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12413.json"}},{"package":{"name":"libreswan","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libreswan?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.14-1ubuntu2","5.2-2.2ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"libreswan","binary_version":"5.2-2.2ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12413.json"}},{"package":{"name":"libreswan","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libreswan?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2-2.2ubuntu1","5.2-2.2ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_version":"5.2-2.2ubuntu2","binary_name":"libreswan"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12413.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}