CVE-2024-27034

Data corruption via premature cp_rwsem release

Published May 1, 2024 · Updated Aug 5, 2026

Data corruption in Linux kernel F2FS 5.6 through 6.8.1 allows local users to corrupt persisted file data through compressed-cluster overwrites. f2fs_write_raw_pages releases cp_rwsem while replacing a compressed cluster, allowing partial blocks to persist before cluster metadata is updated atomically. Exploitation requires local write access to a compression-enabled F2FS file and a checkpoint followed by sudden power-off recovery.

CVSS severity7.8
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Data corruption in Linux kernel F2FS 5.6 through 6.8.1 allows local users to corrupt persisted file data through compressed-cluster overwrites. f2fs_write_raw_pages releases cp_rwsem while replacing a compressed cluster, allowing partial blocks to persist before cluster metadata is updated atomically. Exploitation requires local write access to a compression-enabled F2FS file and a checkpoint followed by sudden power-off recovery.

The record

CVE
CVE-2024-27034
Published
May 1, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2024CVE 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=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <2b1b14d9fc94b8feae20808684c8af28ec80f45b
  2. Affected versionversion=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <52982edfcefd475cc34af663d5c47c0cddaa5739
  3. Affected versionversion=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <542c8b3c774a480bfd0804291a12f6f2391b0cd1
  4. Affected versionversion=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <75abfd61392b1db391bde6d738a30d685b843286
  5. Affected versionversion=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <7d420eaaa18ec8e2bb4eeab8c65c00492ef6f416
  6. Affected versionversion=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <fd244524c2cf07b5f4c3fe8abd6a99225c76544b
  7. Affected versionversion=5.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <2b1b14d9fc94b8feae20808684c8af28ec80f45b; version=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <52982edfcefd475cc34af663d5c47c0cddaa5739; version=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <542c8b3c774a480bfd0804291a12f6f2391b0cd1; version=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <75abfd61392b1db391bde6d738a30d685b843286; version=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <7d420eaaa18ec8e2bb4eeab8c65c00492ef6f416; version=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <fd244524c2cf07b5f4c3fe8abd6a99225c76544b; version=5.6

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux CNACVSS: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

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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

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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