CVE-2021-21153: 
Google Chrome vulnerability analysis and mitigation

Stack buffer overflow vulnerability (CVE-2021-21153) was discovered in the GPU Process of Google Chrome on Linux systems prior to version 88.0.4324.182. The vulnerability was reported by Jan Ruge of ERNW GmbH on December 6, 2020, and was publicly disclosed in February 2021 (Chrome Release).

The vulnerability is classified as a stack buffer overflow in the GPU Process component of Chrome, which could allow attackers to perform out-of-bounds memory access through a specially crafted HTML page. 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, indicating network accessibility with user interaction required (NVD).

If successfully exploited, this vulnerability could allow remote attackers to perform out-of-bounds memory access, potentially leading to arbitrary code execution with the privileges of the Chrome browser process. The high CVSS score indicates potential severe impacts on confidentiality, integrity, and availability of the affected system (NVD).

The vulnerability was patched in Chrome version 88.0.4324.182. Users and administrators are advised to update to this version or later. The fix was also distributed to various Linux distributions including Fedora, Ubuntu, and Gentoo through their respective package management systems (Fedora Update, Gentoo Advisory).