{"id":"ALPINE-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":"2026-11-03T06:33:01.401453903Z","published":"2026-07-02T22:16:42.517Z","upstream":["CVE-2026-12413"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2026-12413"}],"affected":[{"package":{"name":"libreswan","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/libreswan?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.6"},{"fixed":"5.3.3-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-12413.json"}},{"package":{"name":"libreswan","ecosystem":"Alpine:v3.24","purl":"pkg:apk/alpine/libreswan?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.6"},{"fixed":"5.3.2-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-12413.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}