CVE-2023-54067

Kernel crash via unlocked dirty-root list deletion

Published Dec 24, 2025 · Updated Dec 24, 2025

Race condition in btrfs in the Linux kernel allows attackers to crash the system through a crafted filesystem image. btrfs_delete_free_space_tree removes a free-space root from fs_info->dirty_cowonly_roots without holding trans_lock while another thread can update the same list. A user or automounter must mount or remount the supplied image, after which the race can corrupt kernel memory and trigger an oops or panic.

CVSS severityUnavailable
Unscored
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in btrfs in the Linux kernel allows attackers to crash the system through a crafted filesystem image. btrfs_delete_free_space_tree removes a free-space root from fs_info->dirty_cowonly_roots without holding trans_lock while another thread can update the same list. A user or automounter must mount or remount the supplied image, after which the race can corrupt kernel memory and trigger an oops or panic.

The record

CVE
CVE-2023-54067
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 2025Record 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=4.5
  2. Affected versionversion=a5ed91828518ab076209266c2bc510adabd078df <6f1c81886b0b56cb88b311e5d2f203625474d892
  3. Affected versionversion=a5ed91828518ab076209266c2bc510adabd078df <8ce9139aea5e60a247bde5af804312f54975f443
  4. Affected versionversion=a5ed91828518ab076209266c2bc510adabd078df <babebf023e661b90b1c78b2baa384fb03a226879

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.5; version=a5ed91828518ab076209266c2bc510adabd078df <6f1c81886b0b56cb88b311e5d2f203625474d892; version=a5ed91828518ab076209266c2bc510adabd078df <8ce9139aea5e60a247bde5af804312f54975f443; version=a5ed91828518ab076209266c2bc510adabd078df <babebf023e661b90b1c78b2baa384fb03a226879

Published CVSS scores

No CVSS assessment is available in this record.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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