---
id: CVE-2026-43117
title: >-
  In the Linux kernel, the following vulnerability has been resolved:


  btrfs: tracepoints: get correct superblock from dentry in event
  btrfs_sync_file()


  If overlay is used on top of btrfs, dentry->d_sb translates to overlay's

  super block …
summary: >-
  In the Linux kernel, the following vulnerability has been resolved:


  btrfs: tracepoints: get correct superblock from dentry in event
  btrfs_sync_file()


  If overlay is used on top of btrfs, dentry->d_sb translates to overlay's

  super block …
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 4.8, < 6.6.136'
  - 'linux_kernel >= 6.7, < 6.12.83'
  - 'linux_kernel >= 6.13, < 6.18.24'
  - 'linux_kernel >= 6.19, < 6.19.14'
  - linux_kernel = 7.0
patched:
  - linux_kernel 6.19.14
published: '2026-05-06'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:19:32.507'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-43117'
references:
  - url: 'https://git.kernel.org/stable/c/2e4adfaec97ee053ad1bdfb5036845e66f7e0d8a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/32372781d664a9b03c40343e96c29d0a6139f97d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4a7bab35fad5251c8cb738161152578cd83b6b9c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/520e8b4bcf872a534a7bf61ccf880047642df296'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a85b46db143fda5869e7d8df8f258ccef5fa1719'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c09a7446aab5773f38d6abb25fce99b8e1dfbc97'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d110d7cdb045715c0b45b0dfd974525bb38f653d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e252db8ca2a01f82d472091f35d549b313278636'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-784472.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00735
epssPercentile: 0.53395
ingestedAt: '2026-10-15T03:30:12.873Z'
---

## Overview

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

btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file()

If overlay is used on top of btrfs, dentry->d_sb translates to overlay's
super block and fsid assignment will lead to a crash.

Use file_inode(file)->i_sb to always get btrfs_sb.

## Affected

- `linux_kernel >= 4.8, < 6.6.136`
- `linux_kernel >= 6.7, < 6.12.83`
- `linux_kernel >= 6.13, < 6.18.24`
- `linux_kernel >= 6.19, < 6.19.14`
- `linux_kernel = 7.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.19.14`