CVE-2021-37970: 
vulnerability analysis and mitigation

CVE-2021-37970 is a Use-after-free vulnerability discovered in the File System API of Google Chrome versions prior to 94.0.4606.54. The vulnerability was disclosed in September 2021 and was reported by SorryMybad (@S0rryMybad) of Kunlun Lab (Chrome Release).

The vulnerability is classified as a Use-after-free (CWE-416) issue in Chrome's File System API. 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 significant impact (NVD).

If exploited, this vulnerability could allow a remote attacker to potentially exploit heap corruption through a specially crafted HTML page, potentially leading to arbitrary code execution with the same privileges as the Chrome browser process (CVE Mitre).

Google addressed this vulnerability in Chrome version 94.0.4606.54. Users and administrators are advised to upgrade to this version or later. The fix was also incorporated into various Linux distributions including Debian 11 (Bullseye) with version 97.0.4692.71-0.1~deb11u1 and Fedora with version 94.0.4606.61 (Debian Advisory, Fedora Update).