---
id: CVE-2026-89577
title: 'dm-io: report non-retryable errors separatedly'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  dm-io: report non-retryable errors separatedly

  The error codes BLK_STS_NOTSUPP and BLK_STS_INVAL should not cause leg
  failure on dm-raid1. This patch changes the inter…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 5ff3f74e145adc79b49668adb8de276446acf6be <
    49694a363f7ecd5a52d1ea1a13c287ad6d196c35
  - >-
    Linux >= 5ff3f74e145adc79b49668adb8de276446acf6be <
    15fc1ec72e1f8089063d298550ada727e18f114a
  - >-
    Linux >= 5ff3f74e145adc79b49668adb8de276446acf6be <
    47a5e62f39875f371bded6e34ffb9cf15ccd813d
  - Linux 6.18
published: '2026-09-11'
updated: '2026-09-11'
sourceUpdated: '2026-09-11T19:44:44.617Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-89577'
references:
  - url: 'https://git.kernel.org/stable/c/49694a363f7ecd5a52d1ea1a13c287ad6d196c35'
  - url: 'https://git.kernel.org/stable/c/15fc1ec72e1f8089063d298550ada727e18f114a'
  - url: 'https://git.kernel.org/stable/c/47a5e62f39875f371bded6e34ffb9cf15ccd813d'
tags:
  - cve.org
epss: 0.00206
epssPercentile: 0.09439
ingestedAt: '2026-09-14T11:11:19.886Z'
---

## Overview

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

dm-io: report non-retryable errors separatedly

The error codes BLK_STS_NOTSUPP and BLK_STS_INVAL should not cause leg
failure on dm-raid1. This patch changes the interface to dm-io, so that
it reports two error bitmaps - error_bits and unsup_bits. The unsup_bit
bitmap tracks BLK_STS_NOTSUPP or BLK_STS_INVAL errors, the error_bits
bitmap tracks all the other errors.

dm-raid1 is changed so that it won't fail a leg if it receives an error
in the unsup_bits bitmap.

This patch (with 62dc37a819a5) fixes misbehavior if the user uses
unaligned bio vectors on dm-raid1.

## Affected

- `Linux >= 5ff3f74e145adc79b49668adb8de276446acf6be < 49694a363f7ecd5a52d1ea1a13c287ad6d196c35`
- `Linux >= 5ff3f74e145adc79b49668adb8de276446acf6be < 15fc1ec72e1f8089063d298550ada727e18f114a`
- `Linux >= 5ff3f74e145adc79b49668adb8de276446acf6be < 47a5e62f39875f371bded6e34ffb9cf15ccd813d`
- `Linux 6.18`

## Remediation

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