CVE-2021-30518: 
Node.js vulnerability analysis and mitigation

CVE-2021-30518 is a heap buffer overflow vulnerability discovered in the Reader Mode feature of Google Chrome versions prior to 90.0.4430.212. The vulnerability was reported by Jun Kokatsu from Microsoft Browser Vulnerability Research on April 28, 2021, and was subsequently patched in May 2021 (Chrome Release).

The vulnerability is classified as a heap buffer overflow vulnerability that specifically affects the Reader Mode component in Google Chrome. It 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 a high-severity issue that requires user interaction but can lead to significant impact (NVD).

The vulnerability could allow a remote attacker to potentially exploit heap corruption through a specially crafted HTML page, potentially leading to arbitrary code execution, information disclosure, or system compromise (NVD, Gentoo).

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