Use of uninitialized resource in Google Chromium - CVE-2026-5888

Vulnerability identifier: #VU125633

CSH Severity: Medium

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-5888

CWE-ID: CWE-908

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to usage of uninitialized resources in WebCodecs in Google Chrome. A remote attacker can trick the victim to visit a specially crafted webpage, trigger uninitialized usage of resources and bypass implemented security mechanisms.

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

Install update from vendor's website.

Google Chromium - update to 147.0.7727.55
Microsoft Edge - update to 147.0.3912.60
Google Chrome - update to 147.0.7727.55
chromium - addressed in versions 147.0.7727.55-1.el9, 147.0.7727.55-1.el10_1, 147.0.7727.55-1.el10_2, 147.0.7727.55-1.el10_3, 147.0.7727.55-1.fc42, 147.0.7727.55-1.fc43, 147.0.7727.55-1.fc44, 147.0.7727.101-1.fc42
chromium (Debian package) - addressed in versions 147.0.7727.55-1~deb12u1, 147.0.7727.55-1~deb13u1

• https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop.html
• https://crbug.com/486506202

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