Use-after-free in Google Chromium - CVE-2021-37993

Vulnerability identifier: #VU57455

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-37993

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 PDF Accessibility in Google Chrome. A remote attacker can trick the victim into visiting a specially crafted web page, trigger a use-after-free error and gain access to sensitive information.

Google Chromium
Google Chrome
Microsoft Edge
Arch Linux
Gentoo Linux
Fedora
vivaldi
qt5-qtwebengine
chromium
chromium (Debian package)

Update to version 95.0.4638.54.

Google Chromium - update to 95.0.4638.54
Google Chrome - update to 95.0.4638.54
Microsoft Edge - update to 95.0.1020.30
vivaldi - update to 5.0.2497.24-1
qt5-qtwebengine - addressed in versions 5.15.8-2.fc34, 5.15.8-2.fc35
chromium - update to 95.0.4638.54-1
chromium (Debian package) - update to 97.0.4692.71-0.1~deb11u1
chromium - addressed in versions 99.0.4844.51-1.el7, 99.0.4844.51-1.el8

• https://chromereleases.googleblog.com/2021/10/stable-channel-update-for-desktop_19.html
• https://crbug.com/1255332
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-37993

• Multiple vulnerabilities in Google Chrome
• Multiple vulnerabilities in Microsoft Edge
• Arch Linux update for opera
• Debian update for chromium
• Gentoo update for Chromium, Google Chrome
• Arch Linux update for chromium
• Arch Linux update for vivaldi
• Fedora 35 update for qt5-qtwebengine
• Fedora 34 update for qt5-qtwebengine
• Fedora EPEL 8 update for chromium
• Fedora EPEL 7 update for chromium