---
id: CVE-2026-45888
title: 'md/raid1: fix memory leak in raid1_run()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  md/raid1: fix memory leak in raid1_run()

  raid1_run() calls setup_conf() which registers a thread via
  md_register_thread(). If raid1_set_limits() fails, the previously
  …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 97894f7d3c2966164516a8a5109674763d3a55e1 <
    c94fd6e8a71efd047ff36930e840f3c25679e136
  - >-
    Linux >= 97894f7d3c2966164516a8a5109674763d3a55e1 <
    ec10e3dc93994b87adf7c759a4639fe34013989a
  - >-
    Linux >= 97894f7d3c2966164516a8a5109674763d3a55e1 <
    b37588b0282a2b3cdda9db1d53712745ce66dea0
  - >-
    Linux >= 97894f7d3c2966164516a8a5109674763d3a55e1 <
    6abc7d5dcf0ee0f85e16e41c87fbd06231f28753
  - Linux 6.9
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T15:43:37.059849Z'
published: '2026-05-27'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T15:53:10.955Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-45888'
references:
  - url: 'https://git.kernel.org/stable/c/c94fd6e8a71efd047ff36930e840f3c25679e136'
  - url: 'https://git.kernel.org/stable/c/ec10e3dc93994b87adf7c759a4639fe34013989a'
  - url: 'https://git.kernel.org/stable/c/b37588b0282a2b3cdda9db1d53712745ce66dea0'
  - url: 'https://git.kernel.org/stable/c/6abc7d5dcf0ee0f85e16e41c87fbd06231f28753'
tags:
  - cve.org
epss: 0.0016
epssPercentile: 0.05182
ingestedAt: '2026-11-06T16:57:43.391Z'
---

## Overview

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

md/raid1: fix memory leak in raid1_run()

raid1_run() calls setup_conf() which registers a thread via
md_register_thread(). If raid1_set_limits() fails, the previously
registered thread is not unregistered, resulting in a memory leak
of the md_thread structure and the thread resource itself.

Add md_unregister_thread() to the error path to properly cleanup
the thread, which aligns with the error handling logic of other paths
in this function.

Compile tested only. Issue found using a prototype static analysis tool
and code review.

## Affected

- `Linux >= 97894f7d3c2966164516a8a5109674763d3a55e1 < c94fd6e8a71efd047ff36930e840f3c25679e136`
- `Linux >= 97894f7d3c2966164516a8a5109674763d3a55e1 < ec10e3dc93994b87adf7c759a4639fe34013989a`
- `Linux >= 97894f7d3c2966164516a8a5109674763d3a55e1 < b37588b0282a2b3cdda9db1d53712745ce66dea0`
- `Linux >= 97894f7d3c2966164516a8a5109674763d3a55e1 < 6abc7d5dcf0ee0f85e16e41c87fbd06231f28753`
- `Linux 6.9`

## Remediation

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