CVE-2026-53023

System crash via unterminated NTFS volume label

Published Jun 24, 2026 · Updated Jun 24, 2026

Out-of-bounds read in the Linux Kernel NTFS3 driver allows local users to crash the system through an exact-length NTFS volume label. ntfs_fill_super() stores converted UTF-8 label bytes without a trailing NUL, and ntfs3_label_show() later formats the fixed buffer as a NUL-terminated string. Reachability requires a crafted NTFS volume to be mounted and its cached label to fill the buffer; the read then continues beyond the label until a terminator is found.

CVSS severity5.5
Medium
EPSS probability0.12%
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 the Linux Kernel NTFS3 driver allows local users to crash the system through an exact-length NTFS volume label. ntfs_fill_super() stores converted UTF-8 label bytes without a trailing NUL, and ntfs3_label_show() later formats the fixed buffer as a NUL-terminated string. Reachability requires a crafted NTFS volume to be mounted and its cached label to fill the buffer; the read then continues beyond the label until a terminator is found.

The record

CVE
CVE-2026-53023
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 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=5.15
  2. Affected versionversion=82cae269cfa953032fbb8980a7d554d60fb00b17 <0b11fcbe80a59acdf58337d80ebb5f72201d73d6
  3. Affected versionversion=82cae269cfa953032fbb8980a7d554d60fb00b17 <32b0686369e0afbb3549a0d93e2d8517da84cd30
  4. Affected versionversion=82cae269cfa953032fbb8980a7d554d60fb00b17 <54d564b762389679e2f8fb9eeb20af7e82371e1c
  5. Affected versionversion=82cae269cfa953032fbb8980a7d554d60fb00b17 <5cd0707b81cb4589f00aec5c4c1288bd0980d2a4
  6. Affected versionversion=82cae269cfa953032fbb8980a7d554d60fb00b17 <6136bbb054f7ab9f51ae99915541633b18bcef90
  7. Affected versionversion=82cae269cfa953032fbb8980a7d554d60fb00b17 <a6cd43fe9b083fa23fe1595666d5738856cb261a
  8. Affected versionversion=82cae269cfa953032fbb8980a7d554d60fb00b17 <bc7a0c34c4ca259cfddf3bc18fc5b3c6411d26ed

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.15; version=82cae269cfa953032fbb8980a7d554d60fb00b17 <0b11fcbe80a59acdf58337d80ebb5f72201d73d6; version=82cae269cfa953032fbb8980a7d554d60fb00b17 <32b0686369e0afbb3549a0d93e2d8517da84cd30; version=82cae269cfa953032fbb8980a7d554d60fb00b17 <54d564b762389679e2f8fb9eeb20af7e82371e1c; version=82cae269cfa953032fbb8980a7d554d60fb00b17 <5cd0707b81cb4589f00aec5c4c1288bd0980d2a4; version=82cae269cfa953032fbb8980a7d554d60fb00b17 <6136bbb054f7ab9f51ae99915541633b18bcef90; version=82cae269cfa953032fbb8980a7d554d60fb00b17 <a6cd43fe9b083fa23fe1595666d5738856cb261a; version=82cae269cfa953032fbb8980a7d554d60fb00b17 <bc7a0c34c4ca259cfddf3bc18fc5b3c6411d26ed

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.1Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/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

T1499Endpoint Denial of Service

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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