How serious is CVE-2021-35942?

This vulnerability has a CVSS score of 9.1 out of 10, classified as CRITICAL severity. Proof-of-concept exploit code is publicly available, making this an active threat.

Is there exploit code available for CVE-2021-35942?

Yes, proof-of-concept exploit code for CVE-2021-35942 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2021-35942?

CVE-2021-35942 affects gnu glibc. Check the full CVE details for specific version information.

How do I fix CVE-2021-35942?

To remediate CVE-2021-35942, check for security patches from gnu. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2021-35942

Critical

|9.1

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

This vulnerability allows an attacker to crash applications or read sensitive information from memory by providing a specially crafted input to the wordexp function in the GNU C Library. It can be exploited when the function is used with untrusted data, potentially leading to service disruptions or data leaks.

Technical 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.

CVSS Vector Analysis

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

Confidentiality ImpactHigh

Integrity ImpactNone

Availability ImpactHigh

ScopeUnchanged

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$6,000($5K-$15K)

Vendor Response

Grade FPatched in 1667 days

Quick Information

Published

Jul 22, 2021

over 4 years ago

Last Modified

Feb 13, 2026

7 days ago

Vendor

gnu

Product

glibc