---
id: CVE-2025-71312
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  fs/ntfs3: fix ntfs_mount_options leak in ntfs_fill_super()

  In ntfs_fill_super(), the fc->fs_private pointer is set to NULL without
  first freeing the memory it points t…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  fs/ntfs3: fix ntfs_mount_options leak in ntfs_fill_super()

  In ntfs_fill_super(), the fc->fs_private pointer is set to NULL without
  first freeing the memory it points t…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-401
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 6.19, < 6.19.4'
patched:
  - linux_kernel 6.19.4
published: '2026-05-27'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-71312'
references:
  - url: 'https://git.kernel.org/stable/c/dac871d833b09495198dcac81d2ebaa8db11acbc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f7edab0cee03a1cbe0e55a7bcab8d2d8b6b74278'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00138
epssPercentile: 0.02779
ingestedAt: '2026-10-14T13:30:58.506Z'
---

## Overview

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

fs/ntfs3: fix ntfs_mount_options leak in ntfs_fill_super()

In ntfs_fill_super(), the fc->fs_private pointer is set to NULL without
first freeing the memory it points to. This causes the subsequent call to
ntfs_fs_free() to skip freeing the ntfs_mount_options structure.

This results in a kmemleak report:

  unreferenced object 0xff1100015378b800 (size 32):
    comm "mount", pid 582, jiffies 4294890685
    hex dump (first 32 bytes):
      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      00 00 00 00 00 00 00 00 ed ff ed ff 00 04 00 00  ................
    backtrace (crc ed541d8c):
      __kmalloc_cache_noprof+0x424/0x5a0
      __ntfs_init_fs_context+0x47/0x590
      alloc_fs_context+0x5d8/0x960
      __x64_sys_fsopen+0xb1/0x190
      do_syscall_64+0x50/0x1f0
      entry_SYSCALL_64_after_hwframe+0x76/0x7e

This issue can be reproduced using the following commands:
        fallocate -l 100M test.file
        mount test.file /tmp/test

Since sbi->options is duplicated from fc->fs_private and does not
directly use the memory allocated for fs_private, it is unnecessary to
set fc->fs_private to NULL.

Additionally, this patch simplifies the code by utilizing the helper
function put_mount_options() instead of open-coding the cleanup logic.

## Affected

- `linux_kernel >= 6.19, < 6.19.4`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.19.4`