CVE-2021-4063: 
vulnerability analysis and mitigation

CVE-2021-4063 is a high-severity vulnerability discovered in Google Chrome's developer tools prior to version 96.0.4664.93. The vulnerability was reported by Abdulrahman Alqabandi from Microsoft Browser Vulnerability Research on November 23, 2021 (Chrome Release).

The vulnerability is classified as a Use-After-Free (UAF) issue in the developer tools component of Google Chrome. It has been assigned 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 network accessibility, low attack complexity, no privileges required, and user interaction required (NVD).

If successfully exploited, this vulnerability could allow a remote attacker to potentially exploit heap corruption via a crafted HTML page, potentially leading to arbitrary code execution within the context of the browser (NVD).

The vulnerability was patched in Chrome version 96.0.4664.93. Users and administrators are advised to upgrade to this version or later. Various Linux distributions have also released security updates to address this vulnerability, including Debian in version 97.0.4692.71-0.1~deb11u1 and Fedora (Debian Advisory, Fedora Update).