Use-after-free in Google Chromium - CVE-2021-4099

Vulnerability identifier: #VU58842

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-2021-4099

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 Swiftshader 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
Microsoft Edge
Gentoo Linux
Fedora
qt5-qtwebengine
chromium
chromium (Debian package)

Update to version 96.0.4664.110.

Google Chromium - update to 96.0.4664.110
Google Chrome - update to 96.0.4664.110
Microsoft Edge - update to 96.0.1054.57
qt5-qtwebengine - addressed in versions 5.15.8-2.fc34, 5.15.8-2.fc35
chromium - addressed in versions 96.0.4664.110-2.el8, 96.0.4664.110-2.fc34, 96.0.4664.110-2.fc35, 96.0.4664.110-3.fc34, 96.0.4664.110-3.fc35
chromium (Debian package) - update to 97.0.4692.71-0.1~deb11u1

• https://chromereleases.googleblog.com/2021/12/stable-channel-update-for-desktop_13.html
• https://crbug.com/1270658
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-4099

• Multiple vulnerabilities in Google Chrome
• Multiple vulnerabilities in Microsoft Edge
• Debian update for chromium
• Gentoo update for Chromium, Google Chrome
• Fedora 34 update for chromium
• Fedora 35 update for chromium
• Fedora EPEL 8 update for chromium
• Fedora 35 update for chromium
• Fedora 34 update for chromium
• Fedora 35 update for qt5-qtwebengine
• Fedora 34 update for qt5-qtwebengine