CVE-2026-72471

Kernel crash via uninitialized NTFS3 cluster value

Published Aug 15, 2026 · Updated Aug 15, 2026

Uninitialized-value use in Linux 7.0 allows local users to crash the kernel by seeking data or holes in an NTFS3 file. When the target VCN is absent from runs[0], attr_data_get_block_locked() returns before initializing lcn, yet ni_seek_data_or_hole() checks that value. Reaching the faulty path requires access to a mounted NTFS3 filesystem; the observed KMSAN failure and SUSE assessment bound the impact to service interruption.

CVSS severity7.1
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uninitialized-value use in Linux 7.0 allows local users to crash the kernel by seeking data or holes in an NTFS3 file. When the target VCN is absent from runs[0], attr_data_get_block_locked() returns before initializing lcn, yet ni_seek_data_or_hole() checks that value. Reaching the faulty path requires access to a mounted NTFS3 filesystem; the observed KMSAN failure and SUSE assessment bound the impact to service interruption.

The record

CVE
CVE-2026-72471
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-457, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=7.0
  2. Affected versionversion=c61326967728392931f8a2240cb2cf4c81b523c1 <57ac2831c8e0f168090d38e3de758c6a59db44db
  3. Affected versionversion=c61326967728392931f8a2240cb2cf4c81b523c1 <7ae7e98b71438c494532492cbf58fc0d7f7988bb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=7.0; version=c61326967728392931f8a2240cb2cf4c81b523c1 <57ac2831c8e0f168090d38e3de758c6a59db44db; version=c61326967728392931f8a2240cb2cf4c81b523c1 <7ae7e98b71438c494532492cbf58fc0d7f7988bb

Published CVSS scores

7.1Linux Kernel CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
5.5SUSECVSS: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-457Use of Uninitialized Variable
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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