{"id":"CVE-2026-101306","title":"SCM_RIGHTS file descriptor passing did not preserve FD_RESOLVE_BENEATH when a descriptor was transferred","summary":"SCM_RIGHTS file descriptor passing did not preserve FD_RESOLVE_BENEATH when a descriptor was transferred.  A process could clear the restriction by sending the descriptor to itself over a Unix domain socket.\n\nA process in a jail that has…","severity":"critical","cwe":["CWE-273","CWE-281"],"vendor":"FreeBSD","product":"FreeBSD","affected":["FreeBSD >= 15.1-RELEASE < p4","FreeBSD >= 15.0-RELEASE < p14","FreeBSD >= 14.5-RELEASE < p1","FreeBSD >= 14.4-RELEASE < p10"],"published":"2026-10-15","updated":"2026-10-15","sourceUpdated":"2026-10-15T16:17:41.437","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-101306","references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:66.jail.asc","label":"secteam@freebsd.org"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-15T07:57:27.843Z","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-16T18:33:08.434808Z"},"cvssSource":"adp","epss":0.00268,"epssPercentile":0.18867,"slug":"CVE-2026-101306","body":"## Overview\n\nSCM_RIGHTS file descriptor passing did not preserve FD_RESOLVE_BENEATH when a descriptor was transferred.  A process could clear the restriction by sending the descriptor to itself over a Unix domain socket.\n\nA process in a jail that has received a directory file descriptor from another jail can use these techniques to escape the jail's filesystem root restriction.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":223172,"id":"CVE-2026-101306","ts":1792176224949,"field":"cvss","old":null,"new":"9.8"},{"seq":223171,"id":"CVE-2026-101306","ts":1792176224949,"field":"severity","old":"none","new":"critical"}]}