CVE-2021-4052: 
vulnerability analysis and mitigation

A use-after-free vulnerability (CVE-2021-4052) was discovered in web apps functionality of Google Chrome versions prior to 96.0.4664.93. This security flaw was reported on November 7, 2021, and was addressed in the December 2021 security update (Chrome Release).

The vulnerability is classified as a use-after-free (CWE-416) issue in the web apps component of Chrome. It received a CVSS v3.1 base score of 8.8 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, indicating a high-severity vulnerability that requires user interaction but could lead to significant impact (NVD).

If successfully exploited, this vulnerability could allow an attacker who convinces a user to install a malicious extension to potentially exploit heap corruption via a crafted Chrome Extension. The high CVSS score indicates potential impacts including unauthorized information disclosure, system compromise, and service disruption (NVD).

The vulnerability requires user interaction in the form of installing a malicious extension. The attack complexity is considered low, requiring no special privileges for exploitation, but does need user interaction to succeed (NVD).

Google addressed this vulnerability in Chrome version 96.0.4664.93. Users and administrators are advised to update to this version or later. Various Linux distributions have also released security updates to address this vulnerability, including Debian (DSA-5046-1), Fedora, and Gentoo (Debian Advisory, Gentoo Advisory).