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.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.8, requiring local system access to exploit with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 1 product from freebsd organizations running these solutions should prioritize assessment and patching.
Reported in 2026, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2026-03-09T12:16:11.403
2026-03-17T15:55:08.573
Analyzed
CVSSv3.1: 8.8 (HIGH)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | freebsd | freebsd | 13.5 | Yes |
| Operating System | freebsd | freebsd | 13.5 | Yes |
| Operating System | freebsd | freebsd | 13.5 | Yes |
| Operating System | freebsd | freebsd | 13.5 | Yes |
| Operating System | freebsd | freebsd | 13.5 | Yes |
| Operating System | freebsd | freebsd | 13.5 | Yes |
| Operating System | freebsd | freebsd | 13.5 | Yes |
| Operating System | freebsd | freebsd | 13.5 | Yes |
| Operating System | freebsd | freebsd | 13.5 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
| Operating System | freebsd | freebsd | 14.3 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For freebsd's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.