Out-of-bounds write in Google Chromium - CVE-2026-3909

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Main Vulnerability Database Vulnerabilities #VU123975

Out-of-bounds write in Google Chromium - CVE-2026-3909

Published: March 12, 2026 / Updated: March 14, 2026


Vulnerability identifier: #VU123975
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-2026-3909
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability: The vulnerability is being exploited in the wild

Vulnerability details

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted HTML content in Skia. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger out-of-bounds write and execute arbitrary code on the target system.

Note, the vulnerability is being exploited in the wild.


Affected software

Google Chromium
Microsoft Edge
Google Chrome
Prisma Access Browser
Debian Linux
Fedora
Chrome OS
cef
chromium
chromium (Debian package)

How to mitigate CVE-2026-3909

Install update from vendor's website.

Google Chromium - update to 146.0.7680.80
Microsoft Edge - update to 146.0.3856.62
Google Chrome - update to 146.0.7680.80
Chrome OS - update to 144.0.7559.246
cef - addressed in versions 146.0.9^chromium146.0.7680.164-1.fc42, 146.0.9^chromium146.0.7680.164-1.fc43, 146.0.9^chromium146.0.7680.164-1.fc44
chromium - addressed in versions 146.0.7680.80-1.el9, 146.0.7680.80-1.el10_1, 146.0.7680.80-1.el10_2, 146.0.7680.80-1.el10_3, 146.0.7680.80-1.fc42, 146.0.7680.80-1.fc43, 146.0.7680.80-1.fc44
chromium (Debian package) - addressed in versions 146.0.7680.80-1~deb12u1, 146.0.7680.80-1~deb13u1
Prisma Access Browser - update to 146.3.8.76

External References

Related Security Bulletins