---
id: CVE-2026-46095
title: 'md/md-llbitmap: raise barrier before state machine transition'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  md/md-llbitmap: raise barrier before state machine transition

  Move the barrier raise operation before calling llbitmap_state_machine()
  in both llbitmap_start_write() a…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 5ab829f1971dc99f2aac10846c378e67fc875abc <
    9142f00a9287ca38152717e3e88a033a27774e7f
  - >-
    Linux >= 5ab829f1971dc99f2aac10846c378e67fc875abc <
    9701d51dd378380ba05293fa391e8ba01065ae8d
  - >-
    Linux >= 5ab829f1971dc99f2aac10846c378e67fc875abc <
    ef4ca3d4bf09716cff9ba00eb0351deadc8417ab
  - Linux 6.18
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:08:35.962545Z'
published: '2026-05-27'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:13:37.889Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-46095'
references:
  - url: 'https://git.kernel.org/stable/c/9142f00a9287ca38152717e3e88a033a27774e7f'
  - url: 'https://git.kernel.org/stable/c/9701d51dd378380ba05293fa391e8ba01065ae8d'
  - url: 'https://git.kernel.org/stable/c/ef4ca3d4bf09716cff9ba00eb0351deadc8417ab'
tags:
  - cve.org
epss: 0.00121
epssPercentile: 0.01907
ingestedAt: '2026-11-06T16:57:43.338Z'
---

## Overview

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

md/md-llbitmap: raise barrier before state machine transition

Move the barrier raise operation before calling llbitmap_state_machine()
in both llbitmap_start_write() and llbitmap_start_discard(). This
ensures the barrier is in place before any state transitions occur,
preventing potential race conditions where the state machine could
complete before the barrier is properly raised.

## Affected

- `Linux >= 5ab829f1971dc99f2aac10846c378e67fc875abc < 9142f00a9287ca38152717e3e88a033a27774e7f`
- `Linux >= 5ab829f1971dc99f2aac10846c378e67fc875abc < 9701d51dd378380ba05293fa391e8ba01065ae8d`
- `Linux >= 5ab829f1971dc99f2aac10846c378e67fc875abc < ef4ca3d4bf09716cff9ba00eb0351deadc8417ab`
- `Linux 6.18`

## Remediation

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