{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-15547", "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109", "state": "PUBLISHED", "assignerShortName": "freebsd", "dateReserved": "2026-01-26T15:57:03.264Z", "datePublished": "2026-03-09T11:46:51.973Z", "dateUpdated": "2026-03-09T11:46:51.973Z"}, "containers": {"cna": {"datePublic": "2026-01-27T23:00:00.000Z", "title": "Jail escape by a privileged user via nullfs", "references": [{"tags": ["vendor-advisory"], "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:02.jail.asc"}], "affected": [{"defaultStatus": "unknown", "modules": ["jail"], "product": "FreeBSD", "vendor": "FreeBSD", "versions": [{"lessThan": "p8", "status": "affected", "version": "14.3-RELEASE", "versionType": "release"}, {"lessThan": "p9", "status": "affected", "version": "13.5-RELEASE", "versionType": "release"}]}], "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."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-269", "description": "CWE-269 Improper Privilege Management", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "63664ac6-956c-4cba-a5d0-f46076e16109", "shortName": "freebsd", "dateUpdated": "2026-03-09T11:46:51.973Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2025-15547", "lastModified": "2026-03-09T13:35:07.393", "metrics": {}, "published": "2026-03-09T12:16:11.403", "references": [{"source": "secteam@freebsd.org", "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:02.jail.asc"}], "sourceIdentifier": "secteam@freebsd.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-269"}], "source": "secteam@freebsd.org", "type": "Secondary"}]}

{}