CVE-2023-26606Public exploit

Local kernel crash via NTFS3 bounds error

Published Feb 26, 2023 · Updated May 5, 2025

Out-of-bounds read in Linux kernel 6.0.8 allows local users to crash the system through an NTFS3 filesystem trim request. The ntfs_trim_fs loop compares its window index with wnd->nbits instead of wnd->nwnd, allowing the index into wnd->free_bits to exceed the allocated array. Reachability requires local access and an NTFS3 trim operation; the demonstrated fault can crash the kernel, while data exposure is unconfirmed.

CVSS severity7.8
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Linux kernel 6.0.8 allows local users to crash the system through an NTFS3 filesystem trim request. The ntfs_trim_fs loop compares its window index with wnd->nbits instead of wnd->nwnd, allowing the index into wnd->free_bits to exceed the allocated array. Reachability requires local access and an NTFS3 trim operation; the demonstrated fault can crash the kernel, while data exposure is unconfirmed.

The record

CVE
CVE-2023-26606
Published
Feb 26, 2023
Updated
May 5, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2023CVE publishedPublication date reported by the CVE source.
  2. May 5, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8CISA-ADPCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Application or System Exploitation

Public exploit references

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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