---
id: CVE-2021-38202
title: >-
  fs/nfsd/trace.h in the Linux kernel before 5.13.4 might allow remote attackers
  to cause a denial of service (out-of-bounds read in strlen) by sending NFS
  traffic when the trace event framework is being used for nfsd.
summary: >-
  fs/nfsd/trace.h in the Linux kernel before 5.13.4 might allow remote attackers
  to cause a denial of service (out-of-bounds read in strlen) by sending NFS
  traffic when the trace event framework is being used for nfsd.
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-125
vendor: netapp
product: hci_management_node
affected:
  - linux_kernel < 5.13.4
  - hci_bootstrap_os
  - hci_management_node
  - solidfire
  - element_software
patched:
  - linux_kernel 5.13.4
published: '2021-08-08'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T12:17:15.473'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-38202'
references:
  - url: 'https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4'
    label: cve@mitre.org
  - url: >-
      https://github.com/torvalds/linux/commit/7b08cf62b1239a4322427d677ea9363f0ab677c6
    label: cve@mitre.org
  - url: 'https://security.netapp.com/advisory/ntap-20210902-0010/'
    label: cve@mitre.org
  - url: 'https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://github.com/torvalds/linux/commit/7b08cf62b1239a4322427d677ea9363f0ab677c6
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20210902-0010/'
    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: 0.0319
epssPercentile: 0.87783
ingestedAt: '2026-10-14T12:29:10.824Z'
---

## Overview

fs/nfsd/trace.h in the Linux kernel before 5.13.4 might allow remote attackers to cause a denial of service (out-of-bounds read in strlen) by sending NFS traffic when the trace event framework is being used for nfsd.

## Affected

- `linux_kernel < 5.13.4`
- `hci_bootstrap_os`
- `hci_management_node`
- `solidfire`
- `element_software`

## Remediation

Upgrade past the affected range:

- `linux_kernel 5.13.4`