---
id: CVE-2021-3483
title: A flaw was found in the Nosy driver in the Linux kernel
summary: >-
  A flaw was found in the Nosy driver in the Linux kernel. This issue allows a
  device to be inserted twice into a doubly-linked list, leading to a
  use-after-free when one of these devices is removed. The highest threat from
  this vulnerabil…
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-416
vendor: netapp
product: cloud_backup
affected:
  - linux_kernel < 5.12
  - linux_kernel = 5.12
  - debian_linux = 9.0
  - cloud_backup
  - h300s_firmware
  - h500s_firmware
  - h700s_firmware
  - h300e_firmware
  - h500e_firmware
  - h700e_firmware
  - h410s_firmware
  - h410c_firmware
patched:
  - linux_kernel 5.12
published: '2021-05-17'
updated: '2026-08-05'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-3483'
references:
  - url: 'http://www.openwall.com/lists/oss-security/2021/04/07/1'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=1948045'
    label: secalert@redhat.com
  - url: 'https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html'
    label: secalert@redhat.com
  - url: 'https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html'
    label: secalert@redhat.com
  - url: 'https://security.netapp.com/advisory/ntap-20210629-0002/'
    label: secalert@redhat.com
  - url: 'http://www.openwall.com/lists/oss-security/2021/04/07/1'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=1948045'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20210629-0002/'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00361
epssPercentile: 0.29923
ingestedAt: '2026-08-05T22:52:53.229Z'
---

## Overview

A flaw was found in the Nosy driver in the Linux kernel. This issue allows a device to be inserted twice into a doubly-linked list, leading to a use-after-free when one of these devices is removed. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. Versions before kernel 5.12-rc6 are affected

## Affected

- `linux_kernel < 5.12`
- `linux_kernel = 5.12`
- `debian_linux = 9.0`
- `cloud_backup`
- `h300s_firmware`
- `h500s_firmware`
- `h700s_firmware`
- `h300e_firmware`
- `h500e_firmware`
- `h700e_firmware`
- `h410s_firmware`
- `h410c_firmware`

## Remediation

Upgrade past the affected range:

- `linux_kernel 5.12`