CVE-2026-72187

System hang via NTFS inode-eviction self-deadlock

Published Aug 15, 2026 · Updated Aug 15, 2026

Deadlock in the Linux kernel NTFS driver 7.1 allows local users to hang the system through inode eviction during writeback. During ntfs_writepages(), an attribute-list update can drop the temporary attribute inode's last reference, reenter ntfs_drop_big_inode() for the base inode, and make truncate_setsize() wait on folio writeback owned by the same worker. The base inode must be unlinked while the affected NTFS writeback path runs; the resulting self-wait leaves the system unresponsive.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deadlock in the Linux kernel NTFS driver 7.1 allows local users to hang the system through inode eviction during writeback. During ntfs_writepages(), an attribute-list update can drop the temporary attribute inode's last reference, reenter ntfs_drop_big_inode() for the base inode, and make truncate_setsize() wait on folio writeback owned by the same worker. The base inode must be unlinked while the affected NTFS writeback path runs; the resulting self-wait leaves the system unresponsive.

The record

CVE
CVE-2026-72187
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-833, 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=7.1
  2. Affected versionversion=b041ca562526b3c4a71b41b80ba5e520eac636ad <5a5f877c5df7605e9bae524a25ec0df9b9cb8ea8
  3. Affected versionversion=b041ca562526b3c4a71b41b80ba5e520eac636ad <77dc384207d5fa63ba97c3bf3285fe1215a1cbf6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=7.1; version=b041ca562526b3c4a71b41b80ba5e520eac636ad <5a5f877c5df7605e9bae524a25ec0df9b9cb8ea8; version=b041ca562526b3c4a71b41b80ba5e520eac636ad <77dc384207d5fa63ba97c3bf3285fe1215a1cbf6

Published CVSS scores

4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Red HatCVSS: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-833Deadlock
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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