---
id: CVE-2021-43975
title: >-
  In the Linux kernel through 5.15.2, hw_atl_utils_fw_rpc_wait in
  drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c allows an
  attacker (who can introduce a crafted device) to trigger an out-of-bounds
  write via a crafted length v…
summary: >-
  In the Linux kernel through 5.15.2, hw_atl_utils_fw_rpc_wait in
  drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c allows an
  attacker (who can introduce a crafted device) to trigger an out-of-bounds
  write via a crafted length v…
severity: medium
cvss: 6.7
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-787
vendor: netapp
product: cloud_backup
affected:
  - linux_kernel <= 5.15.2
  - fedora = 34
  - fedora = 35
  - debian_linux = 9.0
  - debian_linux = 10.0
  - cloud_backup
  - h500s_firmware
  - h700s_firmware
  - h300e_firmware
  - h500e_firmware
  - h700e_firmware
  - h410s_firmware
  - h410c_firmware
published: '2021-11-17'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T22:17:13.743'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-43975'
references:
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=b922f622592af76b57cbc566eaeccda0b31a3496
    label: cve@mitre.org
  - url: 'https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html'
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X24M7KDC4OJOZNS3RDSYC7ELNELOLQ2N/
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YODMYMGZYDXQKGJGX7TJG4XV4L5YLLBD/
    label: cve@mitre.org
  - url: >-
      https://lore.kernel.org/netdev/163698540868.13805.17800408021782408762.git-patchwork-notify%40kernel.org/T/
    label: cve@mitre.org
  - url: 'https://security.netapp.com/advisory/ntap-20211210-0001/'
    label: cve@mitre.org
  - url: 'https://www.debian.org/security/2022/dsa-5096'
    label: cve@mitre.org
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=b922f622592af76b57cbc566eaeccda0b31a3496
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X24M7KDC4OJOZNS3RDSYC7ELNELOLQ2N/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YODMYMGZYDXQKGJGX7TJG4XV4L5YLLBD/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lore.kernel.org/netdev/163698540868.13805.17800408021782408762.git-patchwork-notify%40kernel.org/T/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20211210-0001/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.debian.org/security/2022/dsa-5096'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00551
epssPercentile: 0.44362
ingestedAt: '2026-10-08T23:16:47.325Z'
---

## Overview

In the Linux kernel through 5.15.2, hw_atl_utils_fw_rpc_wait in drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c allows an attacker (who can introduce a crafted device) to trigger an out-of-bounds write via a crafted length value.

## Affected

- `linux_kernel <= 5.15.2`
- `fedora = 34`
- `fedora = 35`
- `debian_linux = 9.0`
- `debian_linux = 10.0`
- `cloud_backup`
- `h500s_firmware`
- `h700s_firmware`
- `h300e_firmware`
- `h500e_firmware`
- `h700e_firmware`
- `h410s_firmware`
- `h410c_firmware`

## Remediation

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