---
id: CVE-2021-35942
title: >-
  The wordexp function in the GNU C Library (aka glibc) through 2.33 may crash
  or read arbitrary memory in parse_param (in posix/wordexp.c) when called with
  an untrusted, crafted pattern, potentially resulting in a denial of service or
  dis…
summary: >-
  The wordexp function in the GNU C Library (aka glibc) through 2.33 may crash
  or read arbitrary memory in parse_param (in posix/wordexp.c) when called with
  an untrusted, crafted pattern, potentially resulting in a denial of service or
  dis…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'
cwe:
  - CWE-190
  - CWE-704
vendor: gnu
product: glibc
affected:
  - glibc < 2.31
  - active_iq_unified_manager
  - 'e-series_santricity_os_controller >= 11.0, <= 11.70.1'
  - hci_management_node
  - ontap_select_deploy_administration_utility
  - solidfire
  - debian_linux = 10.0
patched:
  - glibc 2.31
published: '2021-07-22'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T12:17:13.210'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-35942'
references:
  - url: 'https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html'
    label: cve@mitre.org
  - url: 'https://security.gentoo.org/glsa/202208-24'
    label: cve@mitre.org
  - url: 'https://security.netapp.com/advisory/ntap-20210827-0005/'
    label: cve@mitre.org
  - url: 'https://sourceware.org/bugzilla/show_bug.cgi?id=28011'
    label: cve@mitre.org
  - url: >-
      https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=5adda61f62b77384718b4c0d8336ade8f2b4b35c
    label: cve@mitre.org
  - url: 'https://sourceware.org/glibc/wiki/Security%20Exceptions'
    label: cve@mitre.org
  - url: 'https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.gentoo.org/glsa/202208-24'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20210827-0005/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://sourceware.org/bugzilla/show_bug.cgi?id=28011'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=5adda61f62b77384718b4c0d8336ade8f2b4b35c
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://sourceware.org/glibc/wiki/Security%20Exceptions'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-398330.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-831302.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
epss: 0.02605
epssPercentile: 0.84992
ingestedAt: '2026-10-14T12:29:10.822Z'
---

## Overview

The wordexp function in the GNU C Library (aka glibc) through 2.33 may crash or read arbitrary memory in parse_param (in posix/wordexp.c) when called with an untrusted, crafted pattern, potentially resulting in a denial of service or disclosure of information. This occurs because atoi was used but strtoul should have been used to ensure correct calculations.

## Affected

- `glibc < 2.31`
- `active_iq_unified_manager`
- `e-series_santricity_os_controller >= 11.0, <= 11.70.1`
- `hci_management_node`
- `ontap_select_deploy_administration_utility`
- `solidfire`
- `debian_linux = 10.0`

## Remediation

Upgrade past the affected range:

- `glibc 2.31`