Integer overflow in Google Chromium - CVE-2026-103621

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Main Vulnerability Database Vulnerabilities #VU153202

Integer overflow in Google Chromium - CVE-2026-103621

Published: October 2, 2026


Vulnerability identifier: #VU153202
CSH Severity: High
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-2026-103621
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow in Compositing component in Google Chrome. A remote attacker can trick the victim to open a specially crafted web page, trigger an integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Affected software

Google Chromium
Google Chrome
Debian Linux
Fedora
Chrome OS
chromium (Debian package)
chromium

How to mitigate CVE-2026-103621

Install update from vendor's website.

Google Chromium - update to 154.0.8037.97
Google Chrome - update to 154.0.8037.97
chromium (Debian package) - update to 155.0.8059.39-1~deb13u1
chromium - addressed in versions 154.0.8037.97-1.el9, 154.0.8037.97-1.el10_2, 154.0.8037.97-1.el10_3, 154.0.8037.97-1.el10_4, 154.0.8037.97-1.fc43, 154.0.8037.97-1.fc44, 154.0.8037.97-1.fc45
Chrome OS - update to 154.0.8037.151

External References

Related Security Bulletins