---
id: CVE-2026-90385
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  md/raid1: create serial pool adding rdev to array with serialize_policy=1

  The following bug has been observed with kernel 7.1.3 after adding a new
  rdev to an existing …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  md/raid1: create serial pool adding rdev to array with serialize_policy=1

  The following bug has been observed with kernel 7.1.3 after adding a new
  rdev to an existing …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 69b00b5bb23552d43e8bbed73ef6624604bb94a2 <
    f9e4364449f7ca6917f3599eb32064dba5b7b147
  - >-
    Linux >= 69b00b5bb23552d43e8bbed73ef6624604bb94a2 <
    37f11973c3eb72a5eb061082cad529bb6939c24f
  - >-
    Linux >= 69b00b5bb23552d43e8bbed73ef6624604bb94a2 <
    c02d675e81468003e4f2253b616c53729070d712
  - >-
    Linux >= 69b00b5bb23552d43e8bbed73ef6624604bb94a2 <
    140234b2380ffb8ffb0cfc46fee0e822f43adef7
  - Linux 5.6
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:37.880'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90385'
references:
  - url: 'https://git.kernel.org/stable/c/140234b2380ffb8ffb0cfc46fee0e822f43adef7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/37f11973c3eb72a5eb061082cad529bb6939c24f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c02d675e81468003e4f2253b616c53729070d712'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f9e4364449f7ca6917f3599eb32064dba5b7b147'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.805Z'
epss: 0.002
epssPercentile: 0.10125
---

## Overview

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

md/raid1: create serial pool adding rdev to array with serialize_policy=1

The following bug has been observed with kernel 7.1.3 after adding a new
rdev to an existing RAID1 array with serialize_policy enabled:

  Oops: 0002 [#1]
  CPU: 0 UID: 0 PID: 19639 Comm: ext4lazyinit Not tainted 7.1.3-1-default
  RIP: _raw_spin_lock_irqsave+0x27/0x50
  CR2: 0000000000004960
  Call Trace:
   wait_for_serialization+0xb9/0x260 [raid1]
   raid1_make_request+0x762/0xaff [raid1]
   md_handle_request+0x1c9/0x2e0 [md_mod]

The raid1.c code calls wait_for_serialization() if the MD_SERIALIZE_POLICY
is set, and wait_for_serialization assumes that rdev->serial is
initialized. Normally this will be the case for arrays that have
the serialize_policy sysfs attribute set to 1.

But when a new rdev is added to an existing array in bind_rdev_to_array(),
the condition at mddev_create_serial_pool() causes creation of rdev->serial
to be skipped. Fix it.

## Remediation

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