---
id: CVE-2025-68369
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ntfs3: init run lock for extend inode

  After setting the inode mode of $Extend to a regular file, executing the
  truncate system call will enter the do_truncate() routin…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ntfs3: init run lock for extend inode

  After setting the inode mode of $Extend to a regular file, executing the
  truncate system call will enter the do_truncate() routin…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
published: '2025-12-24'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T11:10:00.203'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-68369'
references:
  - url: 'https://git.kernel.org/stable/c/19164d8228317f3f1fe2662a9ba587cfe3b2d29e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/433d1f7c628c3cbdd7efce064d6c7acd072cf6c4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6e17555728bc469d484c59db4a0abc65c19bc315'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/79c8a77b1782e2ace96d063be3c41ba540d1e20a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/907bf69c6b6ce5d038eec7a599d67b45b62624bc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ab5e8ebeee1caa4fcf8be7d8d62c0a7165469076'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/be99c62ac7e7af514e4b13f83c891a3cccefaa48'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00455
epssPercentile: 0.37652
ingestedAt: '2026-10-13T11:23:51.153Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

ntfs3: init run lock for extend inode

After setting the inode mode of $Extend to a regular file, executing the
truncate system call will enter the do_truncate() routine, causing the
run_lock uninitialized error reported by syzbot.

Prior to patch 4e8011ffec79, if the inode mode of $Extend was not set to
a regular file, the do_truncate() routine would not be entered.

Add the run_lock initialization when loading $Extend.

syzbot reported:
INFO: trying to register non-static key.
Call Trace:
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 assign_lock_key+0x133/0x150 kernel/locking/lockdep.c:984
 register_lock_class+0x105/0x320 kernel/locking/lockdep.c:1299
 __lock_acquire+0x99/0xd20 kernel/locking/lockdep.c:5112
 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
 down_write+0x96/0x1f0 kernel/locking/rwsem.c:1590
 ntfs_set_size+0x140/0x200 fs/ntfs3/inode.c:860
 ntfs_extend+0x1d9/0x970 fs/ntfs3/file.c:387
 ntfs_setattr+0x2e8/0xbe0 fs/ntfs3/file.c:808

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.