CVE-2023-54253

System crash via premature Btrfs extent mapping

Published Dec 30, 2025 · Updated Dec 30, 2025

Denial of service in Linux kernel 5.12 through 6.5.3 allows attackers to panic the host through Btrfs block-group relocation. In fs/btrfs/relocation.c, relocate_one_page marks an extent mapped before btrfs_read_folio initializes subpage metadata, so a later dirty-page operation violates PagePrivate state and triggers a kernel BUG. The path requires an affected Btrfs filesystem, a non-uptodate page, and block-group relocation; the demonstrated consequence is a host crash rather than data access or code execution.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux kernel 5.12 through 6.5.3 allows attackers to panic the host through Btrfs block-group relocation. In fs/btrfs/relocation.c, relocate_one_page marks an extent mapped before btrfs_read_folio initializes subpage metadata, so a later dirty-page operation violates PagePrivate state and triggers a kernel BUG. The path requires an affected Btrfs filesystem, a non-uptodate page, and block-group relocation; the demonstrated consequence is a host crash rather than data access or code execution.

The record

CVE
CVE-2023-54253
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <08daa38ca212d87f77beae839bc9be71079c7abf
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9d1e020ed9649cf140fcfafd052cfdcce9e9d67d
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e7f1326cc24e22b38afc3acd328480a1183f9e79

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <08daa38ca212d87f77beae839bc9be71079c7abf; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9d1e020ed9649cf140fcfafd052cfdcce9e9d67d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e7f1326cc24e22b38afc3acd328480a1183f9e79

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.

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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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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