{"id":"CVE-2026-101304","title":"When fdescfs(4) was mounted in a jail with the \"nodup\" option, opening /dev/fd/N returned a descriptor that did not inherit FD_RESOLVE_BENEATH or the Capsicum capability rights of descriptor N.\n\nA process in a jail that has received a di…","summary":"When fdescfs(4) was mounted in a jail with the \"nodup\" option, opening /dev/fd/N returned a descriptor that did not inherit FD_RESOLVE_BENEATH or the Capsicum capability rights of descriptor N.\n\nA process in a jail that has received a di…","severity":"none","cwe":["CWE-273"],"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":"2026-10-15T07:17:57.550","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-101304","references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:66.jail.asc","label":"secteam@freebsd.org"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-15T07:57:27.842Z","slug":"CVE-2026-101304","body":"## Overview\n\nWhen fdescfs(4) was mounted in a jail with the \"nodup\" option, opening /dev/fd/N returned a descriptor that did not inherit FD_RESOLVE_BENEATH or the Capsicum capability rights of descriptor N.\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":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}