{"id":"CVE-2025-15547","state":"PUBLISHED","title":"Jail escape by a privileged user via nullfs","description":"By default, jailed processes cannot mount filesystems, including nullfs(4).  However, the allow.mount.nullfs option enables mounting nullfs filesystems, subject to privilege checks.\n\nIf a privileged user within a jail is able to nullfs-mount directories, a limitation of the kernel's path lookup logic allows that user to escape the jail's chroot, yielding access to the full filesystem of the host or parent jail.\n\nIn a jail configured to allow nullfs(4) mounts from within the jail, the jailed root user can escape the jail's filesystem root.","publishedAt":"2026-03-09T11:46:51.973Z","updatedAt":"2026-03-10T18:59:55.413Z","severity":{"score":8.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"freebsd","products":["FreeBSD FreeBSD"],"affected":[{"vendor":"FreeBSD","product":"FreeBSD","defaultStatus":"unknown","versions":[{"version":"14.3-RELEASE","status":"affected","lessThan":"p8","versionType":"release"},{"version":"13.5-RELEASE","status":"affected","lessThan":"p9","versionType":"release"}],"modules":["jail"]}],"references":["https://security.freebsd.org/advisories/FreeBSD-SA-26:02.jail.asc"],"weaknesses":["CWE-269"],"ingestedAt":"2026-10-29T20:08:31.050Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/15xxx/CVE-2025-15547.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-15547","state":"PUBLISHED","datePublished":"2026-03-09T11:46:51.973Z","dateUpdated":"2026-03-10T18:59:55.413Z","assignerShortName":"freebsd","assignerOrgId":"63664ac6-956c-4cba-a5d0-f46076e16109","dateReserved":"2026-01-26T15:57:03.264Z"},"containers":{"cna":{"title":"Jail escape by a privileged user via nullfs","descriptions":[{"lang":"en","value":"By default, jailed processes cannot mount filesystems, including nullfs(4).  However, the allow.mount.nullfs option enables mounting nullfs filesystems, subject to privilege checks.\n\nIf a privileged user within a jail is able to nullfs-mount directories, a limitation of the kernel's path lookup logic allows that user to escape the jail's chroot, yielding access to the full filesystem of the host or parent jail.\n\nIn a jail configured to allow nullfs(4) mounts from within the jail, the jailed root user can escape the jail's filesystem root."}],"affected":[{"vendor":"FreeBSD","product":"FreeBSD","defaultStatus":"unknown","versions":[{"version":"14.3-RELEASE","status":"affected","lessThan":"p8","versionType":"release"},{"version":"13.5-RELEASE","status":"affected","lessThan":"p9","versionType":"release"}],"modules":["jail"]}],"references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:02.jail.asc","tags":["vendor-advisory"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-269","description":"CWE-269 Improper Privilege Management","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"freebsd","orgId":"63664ac6-956c-4cba-a5d0-f46076e16109","dateUpdated":"2026-03-09T11:46:51.973Z"},"datePublic":"2026-01-27T23:00:00.000Z","x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"CHANGED","version":"3.1","baseScore":8.8,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-03-10T18:59:30.204346Z","id":"CVE-2025-15547","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":"2026-03-10T18:59:55.413Z"}}]}}}