UBUNTU-CVE-2026-101775: High severity ubuntu/mysql-5.5 vulnerability
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Replication). Supported versions that are affected are MySQL Server: 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster: 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3 and 26.7.0-26.7.1. Difficult to exploit 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 creation, deletion or modification access to critical data or all MySQL Server, MySQL Cluster accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 7.4 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H).
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
ubuntu/mysql-8.0to a version that resolves this vulnerability.Fixed in 8.0.46-0ubuntu0.22.04.5 - Upgrade
Upgrade
ubuntu/mysql-8.0to a version that resolves this vulnerability.Fixed in 8.0.46-0ubuntu0.24.04.5 - Upgrade
Upgrade
ubuntu/mysql-9.7to a version that resolves this vulnerability.Fixed in 9.7.4-0ubuntu0.26.10.1 - Upgrade
Upgrade
ubuntu/mysql-8.4to a version that resolves this vulnerability.Fixed in 8.4.13-0ubuntu0.26.04.2
Event History
Frequently Asked Questions
Does exploitation require MySQL credentials or user interaction?
No. The vulnerability is described as exploitable by an unauthenticated attacker with network access via multiple protocols, and it requires no user interaction. Exploitation is rated difficult because the attack complexity is high.
What could a successful attack allow an attacker to do?
A successful attack can allow unauthorized creation, deletion, or modification of critical data or all data accessible to the affected MySQL Server or MySQL Cluster instance. It can also cause a hang or a frequently repeatable crash resulting in complete denial of service.
Which Ubuntu database packages are associated with this advisory?
The listed Ubuntu packages are mysql-8.0, mysql-5.7, mysql-5.5, mariadb, mariadb-10.0, mariadb-10.1, percona-server-5.6, and percona-xtradb-cluster-5.6.