CVE-2023-54187

Local data exposure and corruption via rename race

Published Dec 30, 2025 · Updated Dec 30, 2025

Filesystem corruption in the Linux kernel allows local users to expose or overwrite data by racing cross-directory F2FS moves. f2fs_rename reads an old directory entry before locking the moved directory, allowing a concurrent inline-to-normal dentry conversion to invalidate the retained page and redirect later writes. Exploitation requires local write access to two directories on a mounted F2FS filesystem; successful races can disclose disk blocks, corrupt metadata, hang the filesystem, or crash the kernel.

CVSS severity7.8
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Filesystem corruption in the Linux kernel allows local users to expose or overwrite data by racing cross-directory F2FS moves. f2fs_rename reads an old directory entry before locking the moved directory, allowing a concurrent inline-to-normal dentry conversion to invalidate the retained page and redirect later writes. Exploitation requires local write access to two directories on a mounted F2FS filesystem; successful races can disclose disk blocks, corrupt metadata, hang the filesystem, or crash the kernel.

The record

CVE
CVE-2023-54187
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

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 <0a76082a4a32a90d1ef33dee8b400efc082b4b6f
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3e77036246123ff710fa2661dcaa12a45284f09b
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8a0b544b7caedfbc05065b6377fd1d8bf7ef5e70
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8f57f3e112cf1d16682b6ff9c31c72f40f7da9c9
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <957904f531fd857a92743b11fbc9c9ffdf7f3207
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d94772154e524b329a168678836745d2773a6e02
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f20191100952013f0916418cdaed0ab55c7b634c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0a76082a4a32a90d1ef33dee8b400efc082b4b6f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3e77036246123ff710fa2661dcaa12a45284f09b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8a0b544b7caedfbc05065b6377fd1d8bf7ef5e70; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8f57f3e112cf1d16682b6ff9c31c72f40f7da9c9; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <957904f531fd857a92743b11fbc9c9ffdf7f3207; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d94772154e524b329a168678836745d2773a6e02; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f20191100952013f0916418cdaed0ab55c7b634c

Published CVSS scores

7.8Linux Kernel CVE TeamCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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