CVE-2023-45896

Kernel-memory disclosure via unchecked NTFS filename length

Published Aug 28, 2024 · Updated Nov 3, 2025

An out-of-bounds read in Linux kernel NTFS3 through 6.8.0 allows physically proximate attackers to read kernel memory. The directory iterator passes an unvalidated $FILE_NAME character count to ntfs_utf16_to_nls(), which reads beyond the allocated attribute. Exploitation requires mounting and listing an attacker-modified NTFS image, with exposure depending on permission to mount removable media.

CVSS severity7.1
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds read in Linux kernel NTFS3 through 6.8.0 allows physically proximate attackers to read kernel memory. The directory iterator passes an unvalidated $FILE_NAME character count to ntfs_utf16_to_nls(), which reads beyond the allocated attribute. Exploitation requires mounting and listing an attacker-modified NTFS image, with exposure depending on permission to mount removable media.

The record

CVE
CVE-2023-45896
Published
Aug 28, 2024
Updated
Nov 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-276, CWE-125, T1005
Attack vector
physical
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 28, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 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 vectorphysical
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.6SUSECVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.1SUSECVSS:4.0/AV:P/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
3.2Amazon LinuxCVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
4.5Oracle LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
7.1CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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.

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)
Vectorphysical
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-276Incorrect Default Permissions
CWE-125Out-of-bounds Read
T1005Data from Local System

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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