{"id":"CVE-2026-101306","aliases":["EUVD-2026-101867","GHSA-3c4j-rmc7-2x5m"],"status":"published","title":"Multiple jail filesystem root escapes","description":"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 received a directory file descriptor from another jail can use these techniques to escape the jail's filesystem root restriction.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-08","score":0.00268,"percentile":0.19078,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-273","CWE-281"],"published":"2026-10-15T06:46:25Z","modified":"2026-10-20T00:21:10Z","products":[{"vendor":"freebsd","product":"freebsd"}],"references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:66.jail.asc","tags":["vendor-advisory","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-101306"},{"url":"https://github.com/advisories/GHSA-3c4j-rmc7-2x5m"}],"sources":{"cve":[{"id":"CVE-2026-101306","title":"Multiple jail filesystem root escapes","description":"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 received a directory file descriptor from another jail can use these techniques to escape the jail's filesystem root restriction.","status":"published","published":"2026-10-15T06:46:25.804Z","modified":"2026-10-16T18:33:15.815Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-273","CWE-281"],"updated_at":"2026-11-02T14:20:09.448255Z"}],"euvd":[{"id":"EUVD-2026-101867","description":"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 received a directory file descriptor from another jail can use these techniques to escape the jail's filesystem root restriction.","status":"published","published":"2026-10-15T06:46:25Z","modified":"2026-10-16T18:33:15Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T17:00:03.938875Z"}],"ghsa":[{"id":"GHSA-3c4j-rmc7-2x5m","title":"SCM_RIGHTS file descriptor passing did not preserve FD_RESOLVE_BENEATH when a descriptor was...","description":"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 received a directory file descriptor from another jail can use these techniques to escape the jail's filesystem root restriction.","status":"published","published":"2026-10-15T09:30:32Z","modified":"2026-10-16T21:33:48Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-273"],"updated_at":"2026-11-02T15:13:52.91817Z"}],"nvd":[{"id":"CVE-2026-101306","description":"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 received a directory file descriptor from another jail can use these techniques to escape the jail's filesystem root restriction.","status":"published","published":"2026-10-15T07:17:57.78Z","modified":"2026-10-20T00:21:10.45Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-273","CWE-281"],"updated_at":"2026-11-02T14:12:59.328869Z"}]}}