Use of Uninitialized Variable in Google Chromium - CVE-2026-6311

Vulnerability identifier: #VU126292

CSH Severity: Medium

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-2026-6311

CWE-ID: CWE-457

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

The vulnerability exists due to use of uninitialized variable in Accessibility component. A remote attacker can trick the victim into visiting a specially crafted website, trigger memory corruption and execute arbitrary code on the system.

Google Chromium
Microsoft Edge
Google Chrome
Debian Linux
Fedora
chromium
chromium (Debian package)

Install update from vendor's repository.

Google Chromium - update to 147.0.7727.101
Microsoft Edge - addressed in versions 146.0.3856.130, 147.0.3912.72
Google Chrome - update to 147.0.7727.101
chromium - addressed in versions 147.0.7727.101-1.el9, 147.0.7727.101-1.el10_1, 147.0.7727.101-1.el10_2, 147.0.7727.101-1.el10_3, 147.0.7727.101-1.fc42, 147.0.7727.101-1.fc43, 147.0.7727.101-1.fc44
chromium (Debian package) - addressed in versions 147.0.7727.101-1~deb12u1, 147.0.7727.101-1~deb13u1

• https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop_15.html
• https://crbug.com/498201025

• Multiple vulnerabilities in Google Chrome
• Fedora EPEL 10.1 update for chromium
• Fedora EPEL 9 update for chromium
• Fedora EPEL 10.3 update for chromium
• Fedora 44 update for chromium
• Fedora 42 update for chromium
• Fedora EPEL 10.2 update for chromium
• Fedora 43 update for chromium
• Multiple vulnerabilities in Microsoft Edge
• Debian update for chromium