{"id":"CVE-2026-88265","title":"A flaw was found in crun","summary":"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 configura…","severity":"medium","cvss":5.6,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N","cwe":["CWE-59"],"vendor":"Red Hat","product":"crun","affected":["crun (all versions)"],"published":"2026-09-10","updated":"2026-09-15","sourceUpdated":"2026-09-15T16:17:38.437","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88265","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-88265","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2531224","label":"secalert@redhat.com"},{"url":"https://github.com/containers/crun/","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88265.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-88265"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88265"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00119,"epssPercentile":0.02042,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-10T17:28:48.530459Z"},"ingestedAt":"2026-09-12T14:34:23.291Z","slug":"CVE-2026-88265","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Hardened Images, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4, … · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88265.json)","depth":"sunlit","depthScore":31,"depthScoreParts":{"impact":30.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}