CVE-2021-21224: 
Google Chrome vulnerability analysis and mitigation

CVE-2021-21224 is a type confusion vulnerability discovered in V8, Google Chrome's JavaScript engine. The vulnerability was reported by Jose Martinez (tr0y4) from VerSprite Inc. on April 5, 2021, and affects Google Chrome versions prior to 90.0.4430.85. This vulnerability allows a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page (NVD, Chrome Release).

The vulnerability is classified as a type confusion flaw in the V8 JavaScript engine. According to security researchers, the bug is triggered when performing integer data type conversion, resulting in an out-of-bounds condition that could be used to achieve arbitrary memory read/write primitive. The vulnerability 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 (NVD).

The vulnerability allows remote attackers to execute arbitrary code within the browser's sandbox environment through a specially crafted HTML page. This could potentially lead to unauthorized access to sensitive information, manipulation of browser data, or further exploitation attempts within the sandboxed environment (Hacker News).

Google released a patch in Chrome version 90.0.4430.85 to address this vulnerability. Users are strongly advised to update their Chrome browsers to this version or later. The fix was also distributed to other Chromium-based browsers. Various Linux distributions including Debian, Fedora, and Gentoo have released security updates to address this vulnerability in their respective chromium packages (Chrome Release, Debian Security).