CVE-2021-30519: 
Google Chrome vulnerability analysis and mitigation

CVE-2021-30519 is a Use-after-free vulnerability discovered in the Payments component of Google Chrome versions prior to 90.0.4430.212. The vulnerability was disclosed and patched in May 2021, affecting the Chrome browser's payment processing functionality (Chrome Release).

The vulnerability is classified as a Use-after-free (CWE-416) issue in the Payments system of Google 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 (NVD).

If successfully exploited, this vulnerability could allow an attacker to potentially exploit heap corruption through a crafted HTML page, leading to arbitrary code execution, provided they can convince a user to install a malicious payments app (NVD, Gentoo).

The vulnerability requires user interaction and the installation of a malicious payments app to be exploited. The attacker would need to craft a specific HTML page to trigger the heap corruption and execute the exploit (NVD).

The vulnerability was patched in Chrome version 90.0.4430.212. Users and administrators are advised to update to this version or later. Various Linux distributions including Fedora and Gentoo have also released security updates to address this vulnerability (Gentoo, Fedora).