{"id":"CVE-2026-88265","summary":"Crun: crun: /dev/null symlink follow during stdio reopen allows host bind-mount write and chown","details":"A flaw was found in crun. After pivot_root, reopening /dev/null for stdio can follow a symlink and attach a host file to container stdio, then change that file's ownership. Affected versions are crun 1.29.1 and earlier. Default configurations that mount a fresh /dev are not exposed. No fixed release is available yet.","modified":"2026-10-21T03:00:02.531724901Z","published":"2026-09-10T08:57:03.229Z","related":["openSUSE-SU-2026:12162-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88265.json","unresolved_ranges":[{"extracted_events":[{"source":"AFFECTED_FIELD","strategy":"InverseAffectedRanges","range":[{"fixed":"1.30-1.hum1"}]}]}],"cna_assigner":"redhat","cwe_ids":["CWE-59"]},"references":[{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"WEB","url":"https://catalog.redhat.com/software/containers/"},{"type":"WEB","url":"https://github.com/containers/crun/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:71668"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-88265"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88265.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88265"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2531224"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/containers/crun","events":[{"introduced":"0"},{"last_affected":"f0d911de5587342cfeb16473bf32ecdfeaf25957"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"0"},{"last_affected":"1.29.1"}],"source":"DESCRIPTION"}]}}],"versions":["1.29.1","1.27","1.5","1.0","0.12.1","0.10.6","0.10.5","0.10.4","0.10.3","0.10.2","0.10.1","0.10","0.9.1","0.9","0.8","0.7","0.6","0.5","0.4","v0.3","v0.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-88265.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N"}]}