{"id":"CVE-2026-101304","state":"PUBLISHED","title":"Multiple jail filesystem root escapes","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.","publishedAt":"2026-10-15T06:46:03.792Z","updatedAt":"2026-10-20T16:53:31.151Z","severity":{"score":7.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","source":"CISA-ADP"},"assigner":"freebsd","products":["FreeBSD FreeBSD"],"affected":[{"vendor":"FreeBSD","product":"FreeBSD","defaultStatus":"unknown","versions":[{"version":"15.1-RELEASE","status":"affected","lessThan":"p4","versionType":"release"},{"version":"15.0-RELEASE","status":"affected","lessThan":"p14","versionType":"release"},{"version":"14.5-RELEASE","status":"affected","lessThan":"p1","versionType":"release"},{"version":"14.4-RELEASE","status":"affected","lessThan":"p10","versionType":"release"}],"modules":["jail"]}],"references":["https://security.freebsd.org/advisories/FreeBSD-SA-26:66.jail.asc"],"weaknesses":["CWE-273"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/101xxx/CVE-2026-101304.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-101304","state":"PUBLISHED","datePublished":"2026-10-15T06:46:03.792Z","dateUpdated":"2026-10-20T16:53:31.151Z","assignerShortName":"freebsd","assignerOrgId":"63664ac6-956c-4cba-a5d0-f46076e16109","dateReserved":"2026-09-28T13:33:02.323Z"},"containers":{"cna":{"title":"Multiple jail filesystem root escapes","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"FreeBSD","product":"FreeBSD","defaultStatus":"unknown","versions":[{"version":"15.1-RELEASE","status":"affected","lessThan":"p4","versionType":"release"},{"version":"15.0-RELEASE","status":"affected","lessThan":"p14","versionType":"release"},{"version":"14.5-RELEASE","status":"affected","lessThan":"p1","versionType":"release"},{"version":"14.4-RELEASE","status":"affected","lessThan":"p10","versionType":"release"}],"modules":["jail"]}],"references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:66.jail.asc","tags":["vendor-advisory"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-273","description":"CWE-273: Improper Check for Dropped Privileges","lang":"en","type":"CWE"},{"cweId":"CWE-273","description":"CWE-278: Insecure Preserved Inherited Permissions","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"freebsd","orgId":"63664ac6-956c-4cba-a5d0-f46076e16109","dateUpdated":"2026-10-15T06:46:03.792Z"},"datePublic":"2026-09-29T20:30:00.000Z","credits":[{"lang":"en","type":"finder","value":"Jan Bramkamp"}],"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.1,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-10-20T16:52:53.826657Z","id":"CVE-2026-101304","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-20T16:53:31.151Z"}}]}}}