---
id: CVE-2022-49044
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  dm integrity: fix memory corruption when tag_size is less than digest size

  It is possible to set up dm-integrity in such a way that the
  "tag_size" parameter is less th…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  dm integrity: fix memory corruption when tag_size is less than digest size

  It is possible to set up dm-integrity in such a way that the
  "tag_size" parameter is less th…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-787
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 4.12, < 4.19.240'
  - 'linux_kernel >= 4.20, < 5.4.190'
  - 'linux_kernel >= 5.5, < 5.10.112'
  - 'linux_kernel >= 5.11, < 5.15.35'
  - 'linux_kernel >= 5.16, < 5.17.4'
  - linux_kernel = 5.18
patched:
  - linux_kernel 5.17.4
published: '2025-02-26'
updated: '2026-08-13'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-49044'
references:
  - url: 'https://git.kernel.org/stable/c/08c1af8f1c13bbf210f1760132f4df24d0ed46d6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4d485cf9b609709e45d5113e6e2b1b01254b2fe9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6a95d91c0b315c965198f6ab7dec7c94129e17e0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6b4bf97587ef6c1927a78934b700204920655123'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7f84c937222944c03f4615ca4742df6bed0e5adf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/cd02b2687d66f0a8e716384de4b9a0671331f1dc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00282
epssPercentile: 0.21003
ingestedAt: '2026-08-13T00:57:22.029Z'
---

## Overview

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

dm integrity: fix memory corruption when tag_size is less than digest size

It is possible to set up dm-integrity in such a way that the
"tag_size" parameter is less than the actual digest size. In this
situation, a part of the digest beyond tag_size is ignored.

In this case, dm-integrity would write beyond the end of the
ic->recalc_tags array and corrupt memory. The corruption happened in
integrity_recalc->integrity_sector_checksum->crypto_shash_final.

Fix this corruption by increasing the tags array so that it has enough
padding at the end to accomodate the loop in integrity_recalc() being
able to write a full digest size for the last member of the tags
array.

## Affected

- `linux_kernel >= 4.12, < 4.19.240`
- `linux_kernel >= 4.20, < 5.4.190`
- `linux_kernel >= 5.5, < 5.10.112`
- `linux_kernel >= 5.11, < 5.15.35`
- `linux_kernel >= 5.16, < 5.17.4`
- `linux_kernel = 5.18`

## Remediation

Upgrade past the affected range:

- `linux_kernel 5.17.4`