CVE-2022-39408: 
MySQL vulnerability analysis and mitigation

CVE-2022-39408 is a vulnerability in the MySQL Server product of Oracle MySQL, specifically affecting the Server Optimizer component. The vulnerability affects MySQL Server versions 8.0.30 and prior. This security issue was disclosed as part of Oracle's Critical Patch Update in October 2022 (Oracle CPU).

The vulnerability has been assigned a CVSS v3.1 Base Score of 6.5 (MEDIUM) with the following vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H. The vulnerability is characterized by being easily exploitable, requiring low attack complexity and low privileges, with no user interaction needed. The scope is unchanged, and the primary impact is on system availability (Oracle CPU).

Successful exploitation of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. The vulnerability affects availability while having no direct impact on confidentiality or integrity (Oracle CPU).

Multiple vendors have released patches to address this vulnerability. MySQL has been updated to version 8.0.31 in Ubuntu 20.04 LTS and Ubuntu 22.04 LTS, while Ubuntu 18.04 LTS has been updated to MySQL 5.7.40 (Ubuntu Notice). Fedora has also released updates through community-mysql-8.0.32 for both Fedora 36 and 37 (Fedora Update).