CVE-2024-27036

File data corruption via skipped CIFS writeback page

Published May 1, 2024 · Updated May 11, 2026

Data corruption in CIFS writeback in affected Linux 6.3, 6.6, 6.7, and 6.8 releases causes local file writes to omit data. When cifs_extend_writeback() reaches a folio that would exceed wsize, it calls xas_pause(), which advances the iterator and skips that page instead of resetting the scan. The condition requires a CIFS mount and a write crossing the configured wsize; the resulting remote file differs from its source.

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 CIFS writeback in affected Linux 6.3, 6.6, 6.7, and 6.8 releases causes local file writes to omit data. When cifs_extend_writeback() reaches a folio that would exceed wsize, it calls xas_pause(), which advances the iterator and skips that page instead of resetting the scan. The condition requires a CIFS mount and a write crossing the configured wsize; the resulting remote file differs from its source.

The record

CVE
CVE-2024-27036
Published
May 1, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=6.3
  2. Affected versionversion=d08089f649a0cfb2099c8551ac47eef0cc23fdf2 <65f2ced695982ccd516196d0a9447d85dbe2eed5
  3. Affected versionversion=d08089f649a0cfb2099c8551ac47eef0cc23fdf2 <844b4e132f57f1333dc79feaa035075a096762e4
  4. Affected versionversion=d08089f649a0cfb2099c8551ac47eef0cc23fdf2 <e45deec35bf7f1f4f992a707b2d04a8c162f2240
  5. Affected versionversion=d08089f649a0cfb2099c8551ac47eef0cc23fdf2 <f3dc1bdb6b0b0693562c7c54a6c28bafa608ba3c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.3; version=d08089f649a0cfb2099c8551ac47eef0cc23fdf2 <65f2ced695982ccd516196d0a9447d85dbe2eed5; version=d08089f649a0cfb2099c8551ac47eef0cc23fdf2 <844b4e132f57f1333dc79feaa035075a096762e4; version=d08089f649a0cfb2099c8551ac47eef0cc23fdf2 <e45deec35bf7f1f4f992a707b2d04a8c162f2240; version=d08089f649a0cfb2099c8551ac47eef0cc23fdf2 <f3dc1bdb6b0b0693562c7c54a6c28bafa608ba3c

Published CVSS scores

7.8NIST NVDCVSS: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

CWE-787Out-of-bounds Write

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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