CVE-2025-15547

Jail escape via nullfs dot-dot lookup

Published Mar 9, 2026 · Updated Mar 9, 2026

Improper privilege management in FreeBSD 13.5-RELEASE before p9 and 14.3-RELEASE before p8 allows local users to escape a jail. Moving a lower directory beneath a nullfs mount causes dot-dot lookups to create nullfs vnodes outside the mountpoint, bypassing vfs_lookup's root-vnode equality check. Exploitation requires jailed root privileges and allow.mount.nullfs; success exposes the host or parent jail's full filesystem.

CVSS severity8.8
High
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper privilege management in FreeBSD 13.5-RELEASE before p9 and 14.3-RELEASE before p8 allows local users to escape a jail. Moving a lower directory beneath a nullfs mount causes dot-dot lookups to create nullfs vnodes outside the mountpoint, bypassing vfs_lookup's root-vnode equality check. Exploitation requires jailed root privileges and allow.mount.nullfs; success exposes the host or parent jail's full filesystem.

The record

CVE
CVE-2025-15547
Published
Mar 9, 2026
Updated
Mar 9, 2026
Vendor
The FreeBSD Project
Product
FreeBSD
Classifications
CWE-269, T1611
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Mar 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=13.5-RELEASE <p9
  2. Affected versionversion=14.3-RELEASE <p8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The FreeBSD Project · FreeBSDversion=13.5-RELEASE <p9; version=14.3-RELEASE <p8

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
8.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1611Escape to Host

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo