---
id: CVE-2025-71295
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  fs/buffer: add alert in try_to_free_buffers() for folios without buffers

  try_to_free_buffers() can be called on folios with no buffers attached
  when filemap_release_fo…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  fs/buffer: add alert in try_to_free_buffers() for folios without buffers

  try_to_free_buffers() can be called on folios with no buffers attached
  when filemap_release_fo…
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-476
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 6.1.72, < 6.1.165'
  - 'linux_kernel >= 6.2, < 6.6.128'
  - 'linux_kernel >= 6.7, < 6.12.75'
  - 'linux_kernel >= 6.13, < 6.18.16'
  - 'linux_kernel >= 6.19, < 6.19.6'
patched:
  - linux_kernel 6.19.6
published: '2026-05-06'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-71295'
references:
  - url: 'https://git.kernel.org/stable/c/1b111a69a6e33a922622bf9870e4e63fb2b649c8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/42c32d7571ccd8ef32351cac506f00b0fae99fd2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/727e5140e0cf83b4ce6a11b89bb73bff5d96f8f3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b68f91ef3b3fe82ad78c417de71b675699a8467c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c1b6227555c52781178132b7a06466711855795c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c6246ca15999053d2632fbcc7b86e6eef7f077cb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00123
epssPercentile: 0.0183
ingestedAt: '2026-10-14T13:30:58.488Z'
---

## Overview

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

fs/buffer: add alert in try_to_free_buffers() for folios without buffers

try_to_free_buffers() can be called on folios with no buffers attached
when filemap_release_folio() is invoked on a folio belonging to a mapping
with AS_RELEASE_ALWAYS set but no release_folio operation defined.

In such cases, folio_needs_release() returns true because of the
AS_RELEASE_ALWAYS flag, but the folio has no private buffer data. This
causes try_to_free_buffers() to call drop_buffers() on a folio with no
buffers, leading to a null pointer dereference.

Adding a check in try_to_free_buffers() to return early if the folio has no
buffers attached, with WARN_ON_ONCE() to alert about the misconfiguration.
This provides defensive hardening.

## Affected

- `linux_kernel >= 6.1.72, < 6.1.165`
- `linux_kernel >= 6.2, < 6.6.128`
- `linux_kernel >= 6.7, < 6.12.75`
- `linux_kernel >= 6.13, < 6.18.16`
- `linux_kernel >= 6.19, < 6.19.6`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.19.6`