{"schemaVersion":3,"id":"CVE-2026-101304","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"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 directory file descriptor from another jail can use these techniques to escape the jail's filesystem root restriction.","dates":{"published":"2026-10-15T06:46:03.792Z","modified":"2026-10-15T06:46:03.792Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.1,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.1,"severity":"high","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00143,"percentile":0.0321,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-15T00:00:00.000Z","score":0.0018,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0018,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0018,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0018,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0018,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00143,"percentile":0.0321}],"last30":[{"date":"2026-10-15T00:00:00.000Z","score":0.0018,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0018,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0018,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0018,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0018,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00143,"percentile":0.0321}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-273","name":"Improper Check for Dropped Privileges","description":"The product attempts to drop privileges but does not check or incorrectly checks to see if the drop succeeded.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/273.html"}],"affected":[{"vendor":"freebsd","product":"freebsd","name":"freebsd","label":"freebsd","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"≥ 15.1-RELEASE, < p4","noFixRecorded":false,"fixedIn":null},{"text":"≥ 15.0-RELEASE, < p14","noFixRecorded":false,"fixedIn":null},{"text":"≥ 14.5-RELEASE, < p1","noFixRecorded":false,"fixedIn":null},{"text":"≥ 14.4-RELEASE, < p10","noFixRecorded":false,"fixedIn":null},{"text":"14.4","noFixRecorded":false,"fixedIn":null},{"text":"14.4:p1","noFixRecorded":false,"fixedIn":null},{"text":"14.4:p2","noFixRecorded":false,"fixedIn":null},{"text":"14.4:p3","noFixRecorded":false,"fixedIn":null},{"text":"14.4:p4","noFixRecorded":false,"fixedIn":null},{"text":"14.4:p5","noFixRecorded":false,"fixedIn":null},{"text":"14.4:p6","noFixRecorded":false,"fixedIn":null},{"text":"14.4:p7","noFixRecorded":false,"fixedIn":null},{"text":"14.4:p8","noFixRecorded":false,"fixedIn":null},{"text":"14.4:p9","noFixRecorded":false,"fixedIn":null},{"text":"14.5","noFixRecorded":false,"fixedIn":null},{"text":"15.0","noFixRecorded":false,"fixedIn":null},{"text":"15.0:p1","noFixRecorded":false,"fixedIn":null},{"text":"15.0:p10","noFixRecorded":false,"fixedIn":null},{"text":"15.0:p11","noFixRecorded":false,"fixedIn":null},{"text":"15.0:p12","noFixRecorded":false,"fixedIn":null},{"text":"15.0:p13","noFixRecorded":false,"fixedIn":null},{"text":"15.0:p2","noFixRecorded":false,"fixedIn":null},{"text":"15.0:p3","noFixRecorded":false,"fixedIn":null},{"text":"15.0:p4","noFixRecorded":false,"fixedIn":null},{"text":"15.0:p5","noFixRecorded":false,"fixedIn":null},{"text":"15.0:p6","noFixRecorded":false,"fixedIn":null},{"text":"15.0:p7","noFixRecorded":false,"fixedIn":null},{"text":"15.0:p8","noFixRecorded":false,"fixedIn":null},{"text":"15.0:p9","noFixRecorded":false,"fixedIn":null},{"text":"15.1","noFixRecorded":false,"fixedIn":null},{"text":"15.1:p1","noFixRecorded":false,"fixedIn":null},{"text":"15.1:p2","noFixRecorded":false,"fixedIn":null},{"text":"15.1:p3","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 15.1-RELEASE, < p4 | ≥ 15.0-RELEASE, < p14 | ≥ 14.5-RELEASE, < p1 | ≥ 14.4-RELEASE, < p10 | 14.4 | 14.4:p1 | 14.4:p2 | 14.4:p3 | 14.4:p4 | 14.4:p5 | 14.4:p6 | 14.4:p7 | 14.4:p8 | 14.4:p9 | 14.5 | 15.0 | 15.0:p1 | 15.0:p10 | 15.0:p11 | 15.0:p12 | 15.0:p13 | 15.0:p2 | 15.0:p3 | 15.0:p4 | 15.0:p5 | 15.0:p6 | 15.0:p7 | 15.0:p8 | 15.0:p9 | 15.1 | 15.1:p1 | 15.1:p2 | 15.1:p3","eol":{"isEol":true,"eolDate":"2026-09-30T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"15.0","label":"releng/15.0","eolFrom":"2026-09-30T00:00:00.000Z","isLts":false,"isMaintained":false,"latestVersion":null},"product":{"name":"freebsd","label":"FreeBSD","category":"os"}},"hubHref":"/vendor/freebsd/freebsd"}],"affectedCount":1,"eol":{"hasEol":true,"count":1},"references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:66.jail.asc","label":"security.freebsd.org/advisories/FreeBSD-SA-26:66.jail.asc","hostname":"security.freebsd.org","tags":["Vendor Advisory","Patch"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-15T06:46:03.792Z","label":"Published","detail":"Vulnerability first disclosed.","source":null}],"risk":{"score":28,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T15:13:32.115Z","stale":false,"partial":false}}