CVE-2020-15991: 
Google Chrome vulnerability analysis and mitigation

CVE-2020-15991 is a security vulnerability discovered in Google Chrome's password manager component affecting versions prior to 86.0.4240.75. The vulnerability was reported by Rong Jian and Guang Gong of Alpha Lab, Qihoo 360 on September 30, 2020 (Chrome Release).

The vulnerability is classified as a Use-After-Free (UAF) issue in the password manager component of Google Chrome. This type of vulnerability occurs when the program continues to use a memory location after it has been freed, which can lead to program crashes or potential code execution. 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).

If exploited, this vulnerability could allow a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. This could lead to arbitrary code execution outside the browser's sandbox environment (NVD).

The vulnerability requires user interaction and a compromised renderer process to be exploited. The attacker would need to craft a specific HTML page that triggers the use-after-free condition in the password manager component (Chrome Release).

The vulnerability was patched in Google Chrome version 86.0.4240.75. Users and administrators are advised to update to this version or later. The fix was also backported to various Linux distributions including Fedora, Debian, and OpenSUSE (Fedora Update, Debian Security).