---
id: CVE-2026-43262
title: 'gfs2: fiemap page fault fix'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  gfs2: fiemap page fault fix

  In gfs2_fiemap(), we are calling iomap_fiemap() while holding the inode
  glock.  This can lead to recursive glock taking if the fiemap buffe…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= e9079cce201784632aed4b1a3121ee38c1ced0b6 <
    5d5d9ec957bfa1eb2b05861c19f5d701dd006db7
  - >-
    Linux >= e9079cce201784632aed4b1a3121ee38c1ced0b6 <
    cead3bebf3e318578b8a86a5472015d713d2a8a8
  - >-
    Linux >= e9079cce201784632aed4b1a3121ee38c1ced0b6 <
    e428670cfb2993d8c224effd076242ca6b0950de
  - >-
    Linux >= e9079cce201784632aed4b1a3121ee38c1ced0b6 <
    5d2c4f182ea8516de8682e2b60411c03df00e3ea
  - >-
    Linux >= e9079cce201784632aed4b1a3121ee38c1ced0b6 <
    2e121c53b581e40397ae08090a7af4ed10781fbc
  - >-
    Linux >= e9079cce201784632aed4b1a3121ee38c1ced0b6 <
    9d15fee888f0e8938c9aeed71ec9c2cbba0c88ab
  - >-
    Linux >= e9079cce201784632aed4b1a3121ee38c1ced0b6 <
    e411d74cc5ba290f85d0dd5e4d1df8f1d6d975d2
  - Linux 2.6.29
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T15:32:20.379943Z'
published: '2026-05-06'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T15:42:44.814Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-43262'
references:
  - url: 'https://git.kernel.org/stable/c/5d5d9ec957bfa1eb2b05861c19f5d701dd006db7'
  - url: 'https://git.kernel.org/stable/c/cead3bebf3e318578b8a86a5472015d713d2a8a8'
  - url: 'https://git.kernel.org/stable/c/e428670cfb2993d8c224effd076242ca6b0950de'
  - url: 'https://git.kernel.org/stable/c/5d2c4f182ea8516de8682e2b60411c03df00e3ea'
  - url: 'https://git.kernel.org/stable/c/2e121c53b581e40397ae08090a7af4ed10781fbc'
  - url: 'https://git.kernel.org/stable/c/9d15fee888f0e8938c9aeed71ec9c2cbba0c88ab'
  - url: 'https://git.kernel.org/stable/c/e411d74cc5ba290f85d0dd5e4d1df8f1d6d975d2'
tags:
  - cve.org
epss: 0.00114
epssPercentile: 0.01495
ingestedAt: '2026-11-06T15:54:03.962Z'
---

## Overview

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

gfs2: fiemap page fault fix

In gfs2_fiemap(), we are calling iomap_fiemap() while holding the inode
glock.  This can lead to recursive glock taking if the fiemap buffer is
memory mapped to the same inode and accessing it triggers a page fault.

Fix by disabling page faults for iomap_fiemap() and faulting in the
buffer by hand if necessary.

Fixes xfstest generic/742.

## Affected

- `Linux >= e9079cce201784632aed4b1a3121ee38c1ced0b6 < 5d5d9ec957bfa1eb2b05861c19f5d701dd006db7`
- `Linux >= e9079cce201784632aed4b1a3121ee38c1ced0b6 < cead3bebf3e318578b8a86a5472015d713d2a8a8`
- `Linux >= e9079cce201784632aed4b1a3121ee38c1ced0b6 < e428670cfb2993d8c224effd076242ca6b0950de`
- `Linux >= e9079cce201784632aed4b1a3121ee38c1ced0b6 < 5d2c4f182ea8516de8682e2b60411c03df00e3ea`
- `Linux >= e9079cce201784632aed4b1a3121ee38c1ced0b6 < 2e121c53b581e40397ae08090a7af4ed10781fbc`
- `Linux >= e9079cce201784632aed4b1a3121ee38c1ced0b6 < 9d15fee888f0e8938c9aeed71ec9c2cbba0c88ab`
- `Linux >= e9079cce201784632aed4b1a3121ee38c1ced0b6 < e411d74cc5ba290f85d0dd5e4d1df8f1d6d975d2`
- `Linux 2.6.29`

## Remediation

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