---
id: CVE-2022-43945
title: >-
  The Linux kernel NFSD implementation prior to versions 5.19.17 and 6.0.2 are
  vulnerable to buffer overflow
summary: >-
  The Linux kernel NFSD implementation prior to versions 5.19.17 and 6.0.2 are
  vulnerable to buffer overflow. NFSD tracks the number of pages held by each
  NFSD thread by combining the receive and send buffers of a remote procedure
  call (RP…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-131
  - CWE-770
vendor: netapp
product: active_iq_unified_manager
affected:
  - linux_kernel < 5.19.17
  - 'linux_kernel >= 6.0, < 6.0.2'
  - active_iq_unified_manager
  - h300s_firmware
  - h500s_firmware
  - h700s_firmware
  - h410s_firmware
  - h410c_firmware
patched:
  - linux_kernel 6.0.2
published: '2022-11-04'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T19:16:54.307'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-43945'
references:
  - url: >-
      http://packetstormsecurity.com/files/171289/Kernel-Live-Patch-Security-Notice-LNS-0092-1.html
    label: disclosure@synopsys.com
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f90497a16e434c2211c66e3de8e77b17868382b8
    label: disclosure@synopsys.com
  - url: 'https://security.netapp.com/advisory/ntap-20221215-0006/'
    label: disclosure@synopsys.com
  - url: >-
      http://packetstormsecurity.com/files/171289/Kernel-Live-Patch-Security-Notice-LNS-0092-1.html
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f90497a16e434c2211c66e3de8e77b17868382b8
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20221215-0006/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-265688.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
epss: 0.22394
epssPercentile: 0.97666
ingestedAt: '2026-10-14T19:49:57.523Z'
---

## Overview

The Linux kernel NFSD implementation prior to versions 5.19.17 and 6.0.2 are vulnerable to buffer overflow. NFSD tracks the number of pages held by each NFSD thread by combining the receive and send buffers of a remote procedure call (RPC) into a single array of pages. A client can force the send buffer to shrink by sending an RPC message over TCP with garbage data added at the end of the message. The RPC message with garbage data is still correctly formed according to the specification and is passed forward to handlers. Vulnerable code in NFSD is not expecting the oversized request and writes beyond the allocated buffer space. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

## Affected

- `linux_kernel < 5.19.17`
- `linux_kernel >= 6.0, < 6.0.2`
- `active_iq_unified_manager`
- `h300s_firmware`
- `h500s_firmware`
- `h700s_firmware`
- `h410s_firmware`
- `h410c_firmware`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.0.2`