CVE-2021-30550: 
Google Chrome vulnerability analysis and mitigation

CVE-2021-30550 is a Use-after-free vulnerability discovered in the Accessibility component of Google Chrome versions prior to 91.0.4472.101. The vulnerability was disclosed in June 2021 and affects Google Chrome browser installations (NVD, Chrome Release).

The vulnerability is classified as a Use-after-free (CWE-416) issue in the Accessibility 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 high severity with potential for full impact on confidentiality, integrity, and availability (NVD).

The vulnerability could allow an attacker who convinces a user to install a malicious extension to potentially exploit heap corruption via a crafted HTML page. This could lead to arbitrary code execution within the context of the browser (NVD, Gentoo Security).

The vulnerability was patched in Chrome version 91.0.4472.101. Users and administrators are advised to upgrade to this version or later. Various Linux distributions including Fedora and Gentoo have also released security updates to address this vulnerability (Chrome Release, Gentoo Security).