---
id: CVE-2022-3621
title: A vulnerability was found in Linux Kernel
summary: >-
  A vulnerability was found in Linux Kernel. It has been classified as
  problematic. Affected is the function nilfs_bmap_lookup_at_level of the file
  fs/nilfs2/inode.c of the component nilfs2. The manipulation leads to null
  pointer dereferen…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-404
  - CWE-476
vendor: linux
product: linux_kernel
affected:
  - linux_kernel
  - debian_linux = 10.0
published: '2022-10-20'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T14:17:25.263'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-3621'
references:
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=21a87d88c2253350e115029f14fe2a10a7e6c856
    label: cna@vuldb.com
  - url: 'https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html'
    label: cna@vuldb.com
  - url: 'https://lists.debian.org/debian-lts-announce/2022/12/msg00034.html'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?id.211920'
    label: cna@vuldb.com
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=21a87d88c2253350e115029f14fe2a10a7e6c856
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2022/12/msg00034.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://vuldb.com/?id.211920'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-794697.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.01725
epssPercentile: 0.77358
ingestedAt: '2026-10-14T15:36:13.923Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2025-04-14T17:08:09.725689Z'
---

## Overview

A vulnerability was found in Linux Kernel. It has been classified as problematic. Affected is the function nilfs_bmap_lookup_at_level of the file fs/nilfs2/inode.c of the component nilfs2. The manipulation leads to null pointer dereference. It is possible to launch the attack remotely. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-211920.

## Affected

- `linux_kernel`
- `debian_linux = 10.0`

## Remediation

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