{"id":"CVE-2026-101304","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-101304","generatedAt":"2026-10-28T01:46:20.181Z","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.","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.","published":"2026-10-15T07:17:58.000Z","lastModified":"2026-10-20T17:17:28.000Z","status":"Modified","sourceIdentifier":"secteam@freebsd.org","cvss":{"version":"3.1","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"},"cwe":["CWE-273"],"affected":["freebsd/freebsd"],"epss":{"score":0.00147,"percentile":0.03868,"date":"2026-10-26","history":[{"date":"2026-10-15","score":0.0018,"percentile":0.07092}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.15%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-20T01:30:17.000Z","detail":{"from":null,"score":"7.1","severity":"HIGH","fromSeverity":null},"summary":"Now scored CVSS 7.1 HIGH."},{"kind":"new","label":"New CVE","at":"2026-10-15T07:17:58.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-15T07:17:57.550Z"},"summary":"New CVE, high severity (CVSS 7.1)."}],"references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:66.jail.asc","tags":["Patch","Vendor Advisory"],"source":"secteam@freebsd.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-101304","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}