CVE-2024-26692

File corruption via non-aligned SMB write size

Published Apr 3, 2024 · Updated Aug 5, 2026

Data corruption in affected Linux kernel SMB clients allows attackers to corrupt files through non-aligned maximum write sizes. The netfs write path skips the end of the final page during large sequential writes when the server-negotiated or mount-specified wsize is not divisible by 4096. Reachability requires an SMB client mount with such a write size and a large sequential write; the bounded consequence is corruption of written file data.

CVSS severity5.5
Medium
EPSS probability0.53%
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 affected Linux kernel SMB clients allows attackers to corrupt files through non-aligned maximum write sizes. The netfs write path skips the end of the final page during large sequential writes when the server-negotiated or mount-specified wsize is not divisible by 4096. Reachability requires an SMB client mount with such a write size and a large sequential write; the bounded consequence is corruption of written file data.

The record

CVE
CVE-2024-26692
Published
Apr 3, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1565.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 3, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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 <4145ccff546ea868428b3e0fe6818c6261b574a9
  3. Affected versionversion=d08089f649a0cfb2099c8551ac47eef0cc23fdf2 <4860abb91f3d7fbaf8147d54782149bb1fc45892
  4. Affected versionversion=d08089f649a0cfb2099c8551ac47eef0cc23fdf2 <63c35afd50e28b49c5b75542045a8c42b696dab9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.3; version=d08089f649a0cfb2099c8551ac47eef0cc23fdf2 <4145ccff546ea868428b3e0fe6818c6261b574a9; version=d08089f649a0cfb2099c8551ac47eef0cc23fdf2 <4860abb91f3d7fbaf8147d54782149bb1fc45892; version=d08089f649a0cfb2099c8551ac47eef0cc23fdf2 <63c35afd50e28b49c5b75542045a8c42b696dab9

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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
T1565.001Stored Data Manipulation

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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