{"id":"CVE-2026-84042","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-84042","summary":"A flaw was found in crun. When crun is built with libkrun and a container is started rootful with passt networking (krun.use_passt), crun can execute attacker-controlled payload from…","details":"A flaw was found in crun. When crun is built with libkrun and a container is started rootful with passt networking (krun.use_passt), crun can execute attacker-controlled payload from the container image with host root privileges. The issue is a regression in crun 1.29. It affects crun >= 1.29","published":"2026-09-10T09:17:03.260","modified":"2026-09-10T18:18:08.943","cvss":{"score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-84042"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2531222"},{"type":"WEB","url":"https://github.com/containers/crun/"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-10T18:18:08.943"}}