CVE-2021-35942 Integer overflow in n/a

What is CVE-2021-35942?

CVE-2021-35942 is a critical vulnerability in Debian Debian Linux, published on 22 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-190, CWE-704

Which versions are affected by CVE-2021-35942?

It affects 7 products.

Products include Debian Debian Linux, Gnu Glibc, Netapp Active Iq Unified Manager, Netapp E-Series Santricity Os Controller, Netapp Hci Management Node, Netapp Ontap Select Deploy Administration Utility and 1 more.

How do I fix CVE-2021-35942?

Apply the vendor's patch.

Is CVE-2021-35942 being exploited?

There is no known exploitation of CVE-2021-35942 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as CLSA-2026-1777456776, DEBIAN-CVE-2021-35942, GHSA-53wq-r63f-m33q, MGASA-2021-0362, OESA-2021-1296, UBUNTU-CVE-2021-35942.