CVE-2022-21339: 
MySQL vulnerability analysis and mitigation

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer) affecting versions 8.0.27 and prior. This vulnerability was disclosed on January 19, 2022. The vulnerability affects the MySQL Server component, specifically the Optimizer module (Oracle Advisory, NVD).

The vulnerability has been assigned a CVSS v3.1 Base Score of 4.9 (Medium) with the vector string: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H. The vulnerability is considered easily exploitable and requires high privileged attacker access with network access via multiple protocols to compromise MySQL Server (NetApp Advisory).

Successful exploitation of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash, leading to a complete Denial of Service (DoS) of MySQL Server (NVD).

Oracle has released patches to address this vulnerability in MySQL version 8.0.28. Users are strongly recommended to upgrade to this version or apply the relevant security patches. The fix is available through various distribution channels including Fedora's package updates for versions 34 and 35 (Fedora Update).