Improperly implemented security check for standard in Google Chromium - CVE-2021-38003

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Main Vulnerability Database Vulnerabilities #VU57765

Improperly implemented security check for standard in Google Chromium - CVE-2021-38003

Published: October 28, 2021 / Updated: June 13, 2025


Vulnerability identifier: #VU57765
CSH Severity: Critical
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-38003
CWE-ID: CWE-358
Exploitation vector: Remote access
Exploit availability: The vulnerability is being exploited in the wild

Vulnerability details

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to incorrect implementation in the V8 engine in Google Chrome. A remote attacker can create a specially crafted web page, trick the victim into visiting it and compromise the system.

Note, the vulnerability is being actively exploited in the wild.


Affected software

Google Chromium
Google Chrome
Microsoft Edge
Gentoo Linux
Arch Linux
Fedora
vivaldi
qt5-qtwebengine
opera
chromium
chromium (Debian package)

How to mitigate CVE-2021-38003

Update to version 95.0.4638.69.

Google Chromium - update to 95.0.4638.69
Google Chrome - update to 95.0.4638.69
Microsoft Edge - update to 95.0.1020.40
vivaldi - update to 5.0.2497.24-1
qt5-qtwebengine - addressed in versions 5.15.8-2.fc34, 5.15.8-2.fc35
opera - update to 81.0.4196.54-1
chromium - update to 95.0.4638.69-1
chromium - addressed in versions 96.0.4664.110-2.el8, 96.0.4664.110-2.fc34, 96.0.4664.110-2.fc35, 96.0.4664.110-3.fc34, 96.0.4664.110-3.fc35
chromium (Debian package) - update to 97.0.4692.71-0.1~deb11u1

Links to Public Exploits and PoC-codes

External References

Related Security Bulletins