Description
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Connection Handling). Supported versions that are affected are MySQL Server: 8.4.0-8.4.9, 9.0.0-9.7.0; MySQL Cluster: 8.0.11-8.0.46, 8.4.0-8.4.9 and 9.0.0-9.7.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Oracle | MySQL Server | 8.4.0-8.4.9, 9.0.0-9.7.0 | — |
| Oracle | MySQL Cluster | 8.0.11-8.0.46, 8.4.0-8.4.9, 9.0.0-9.7.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | mysql-8.4 | 8.4.10-0ubuntu0.26.04.1 | USN-8457-1 |
| Ubuntu 25.10 | mariadb | No fix yet | — |
| Ubuntu 25.10 | mysql-8.4 | 8.4.10-0ubuntu0.25.10.1 | USN-8457-1 |
| Ubuntu 24.04 LTS | mysql-8.0 | 8.0.46-0ubuntu0.24.04.3 | USN-8457-1 |
| Ubuntu 22.04 LTS | mysql-8.0 | 8.0.46-0ubuntu0.22.04.3 | USN-8457-1 |
| Ubuntu 20.04 LTS | mariadb-10.3 | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | percona-server-5.6 +1 | No fix yet | — |
| Ubuntu 14.04 LTS | mysql-5.5 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | mysql-8.0 | 8.0.46-0ubuntu0.20.04.1+esm3 | USN-8457-2 |
| Ubuntu Pro 18.04 LTS | mysql-5.7 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | mysql-5.7 | No fix yet | — |
Advisories 5
- WID-SEC-2026-2437 Oracle Communications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 22, 2026
- USN-8457-2 mysql-8.0 vulnerabilities Ubuntu Security Notices (USN) · Jun 24, 2026
- WID-SEC-2026-1946 Oracle MySQL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 23, 2026
- USN-8457-1 mysql-8.0, mysql-8.4 vulnerabilities Ubuntu Security Notices (USN) · Jun 22, 2026
- NCSC-2026-0205 Kwetsbaarheden verholpen in Oracle MySQL-producten NCSC-NL (Netherlands) · Jun 17, 2026
References
- Oracle Advisory vendor-advisory