CVE-2025-22019

Local data destruction via unchecked subvolume ioctl

Published Apr 16, 2025 · Updated Aug 5, 2026

Authorization bypass in Linux bcachefs allows local users to destroy other users’ subvolumes through a filesystem ioctl. bch2_ioctl_subvolume_destroy() omits inode_permission() checks, while bch2_evict_subvolume_inodes() incorrectly prunes the dcache and leaves stale inodes. Any local user with an open descriptor and path-search permission on a mounted bcachefs filesystem can delete protected data or hang later deletion and unmount operations until reboot.

CVSS severity7.3
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Linux bcachefs allows local users to destroy other users’ subvolumes through a filesystem ioctl. bch2_ioctl_subvolume_destroy() omits inode_permission() checks, while bch2_evict_subvolume_inodes() incorrectly prunes the dcache and leaves stale inodes. Any local user with an open descriptor and path-search permission on a mounted bcachefs filesystem can delete protected data or hang later deletion and unmount operations until reboot.

The record

CVE
CVE-2025-22019
Published
Apr 16, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499, T1485
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a <558317a5c61045d460a37372181e7b43c0c002bb
  2. Affected versionversion=1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a <707549600c4a012ed71c0204a7992a679880bf33
  3. Affected versionversion=1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a <82383abd39abd635511b8956284a5cc8134c4dc1
  4. Affected versionversion=1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a <9e6e83e1e2d01b99e70cd7812d7f758a8def9fc8
  5. Affected versionversion=6.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a <558317a5c61045d460a37372181e7b43c0c002bb; version=1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a <707549600c4a012ed71c0204a7992a679880bf33; version=1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a <82383abd39abd635511b8956284a5cc8134c4dc1; version=1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a <9e6e83e1e2d01b99e70cd7812d7f758a8def9fc8; version=6.7

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.3Linux Kernel CVE TeamCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service
T1485Data Destruction

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

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Your stack

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