Use-after-free in Google Chromium - CVE-2026-103630

Vulnerability identifier: #VU153203

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-2026-103630

CWE-ID: CWE-416

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error within the FedCM component in Google Chrome. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger use-after-free error and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

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

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 - addressed in versions 150.0.7871.256, 154.0.8037.151

• https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop.html
• https://issues.chromium.org/issues/557323166

• Multiple vulnerabilities in Google Chrome
• Fedora 44 update for chromium
• Fedora 45 update for chromium
• Fedora 43 update for chromium
• Fedora EPEL 10.2 update for chromium
• Fedora EPEL 10.4 update for chromium
• Fedora EPEL 10.3 update for chromium
• Fedora EPEL 9 update for chromium
• Multiple vulnerabilities in Google ChromeOS LTS
• Multiple vulnerabilities in Google ChromeOS
• Debian update for chromium