CyberRota Analysis
This is a high severity vulnerability with a CVSS score of 8.8. See the original NVD description below for full technical details.
CVE
CVE-2025-15547
Severity
HIGH
CVSS
8.8
EPSS
0.11%
Original NVD 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. If 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. In a jail configured to allow nullfs(4) mounts from within the jail, the jailed root user can escape the jail's filesystem root.
Related CVEs
Other vulnerabilities affecting the same vendor(s)