CVE-2021-21151: 
Google Chrome vulnerability analysis and mitigation

CVE-2021-21151 is a high-severity vulnerability discovered in Google Chrome's Payments system prior to version 88.0.4324.182. The vulnerability was reported by Khalil Zhani on January 12, 2021, and was publicly disclosed on February 16, 2021. This security flaw affects the Google Chrome browser and involves a use-after-free condition in the Payments component (Chrome Release).

The vulnerability is classified as a use-after-free (CWE-416) issue in the Payments component of Google Chrome. It received a CVSS v3.1 base score of 9.6 (Critical) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H, indicating network accessibility, low attack complexity, no privileges required, and user interaction required for exploitation (NVD).

If successfully exploited, this vulnerability could allow a remote attacker to potentially perform a sandbox escape via a crafted HTML page, which could lead to arbitrary code execution outside the browser's security sandbox. The high CVSS score indicates potential severe impacts on confidentiality, integrity, and availability of the affected system (NVD).

The vulnerability requires user interaction and can be exploited remotely through a crafted HTML page. The attacker would need to convince a user to visit a malicious webpage to trigger the vulnerability. Google awarded a $15,000 bounty for this vulnerability report, indicating its significant security impact (Chrome Release).

Google addressed this vulnerability in Chrome version 88.0.4324.182. Users and administrators are advised to update to this version or later to mitigate the risk. The fix was also incorporated into various Linux distributions, including Fedora, Ubuntu, and Gentoo through their respective security updates (Gentoo Advisory, Fedora Update).