---
id: CVE-2026-72366
title: 'netfs: Fix netfs_create_write_req() to handle async cache object creation'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  netfs: Fix netfs_create_write_req() to handle async cache object creation

  netfs_create_write_req() will skip caching if the fscache cookie is
  disabled, but this is a p…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 7b589a9b45ae32aa9d7bece597490e141198d7a6 <
    aee03fbc8803a40d65e20f1af816a7219048a426
  - >-
    Linux >= 7b589a9b45ae32aa9d7bece597490e141198d7a6 <
    8ab75e445c161c4cb504aa98e20ce1dd1ecd8e9a
  - >-
    Linux >= 7b589a9b45ae32aa9d7bece597490e141198d7a6 <
    1188a9846fadeacf9d1430b528e5217f749d665b
  - >-
    Linux >= 7b589a9b45ae32aa9d7bece597490e141198d7a6 <
    dbd6f56d975b23241b7bbb11bb8f562af548a0aa
  - Linux 6.11
published: '2026-08-15'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T12:44:41.841Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-72366'
references:
  - url: 'https://git.kernel.org/stable/c/aee03fbc8803a40d65e20f1af816a7219048a426'
  - url: 'https://git.kernel.org/stable/c/8ab75e445c161c4cb504aa98e20ce1dd1ecd8e9a'
  - url: 'https://git.kernel.org/stable/c/1188a9846fadeacf9d1430b528e5217f749d665b'
  - url: 'https://git.kernel.org/stable/c/dbd6f56d975b23241b7bbb11bb8f562af548a0aa'
tags:
  - cve.org
epss: 0.00649
epssPercentile: 0.50215
ingestedAt: '2026-10-21T12:48:53.591Z'
---

## Overview

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

netfs: Fix netfs_create_write_req() to handle async cache object creation

netfs_create_write_req() will skip caching if the fscache cookie is
disabled, but this is a problem because async cache object creation might
not have got far enough yet that has been enabled - thereby causing the
call to fscache_begin_write_operation() to be skipped.

Fix this by removing the checks on the cookie and delegating this to
fscache_begin_write_operation().

## Affected

- `Linux >= 7b589a9b45ae32aa9d7bece597490e141198d7a6 < aee03fbc8803a40d65e20f1af816a7219048a426`
- `Linux >= 7b589a9b45ae32aa9d7bece597490e141198d7a6 < 8ab75e445c161c4cb504aa98e20ce1dd1ecd8e9a`
- `Linux >= 7b589a9b45ae32aa9d7bece597490e141198d7a6 < 1188a9846fadeacf9d1430b528e5217f749d665b`
- `Linux >= 7b589a9b45ae32aa9d7bece597490e141198d7a6 < dbd6f56d975b23241b7bbb11bb8f562af548a0aa`
- `Linux 6.11`

## Remediation

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