--- title: "CVE-2025-21555\n | Ubuntu" description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/CVE-2025-21555?format=md keywords: index, follow --- # CVE-2025-21555 Publication date 21 January 2025 Last updated 11 July 2025 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) ## Cvss 3 Severity Score **5.5 · Medium** [Score breakdown](https://ubuntu.com/security/CVE-2025-21555?format=md#impact-score) Toggle side navigation ## Description Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). Supported versions that are affected are 8.0.40 and prior, 8.4.3 and prior and 9.1.0 and prior. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server as well as unauthorized update, insert or delete access to some of MySQL Server accessible data. CVSS 3.1 Base Score 5.5 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H). [Read the notes from the security team](https://ubuntu.com/security/CVE-2025-21555?format=md#notes) ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | percona-xtradb-cluster-5.6 | 26.04 LTS resolute | Not in release | | 25.10 questing | Not in release | | 25.04 plucky | Not in release | | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 22.04 LTS jammy | Not in release | | 20.04 LTS focal | Not in release | | 16.04 LTS xenial | Needs evaluation | | percona-server-5.6 | 26.04 LTS resolute | Not in release | | 25.10 questing | Not in release | | 25.04 plucky | Not in release | | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 22.04 LTS jammy | Not in release | | 20.04 LTS focal | Not in release | | 16.04 LTS xenial | Needs evaluation | | mariadb | 26.04 LTS resolute | Not affected | | 25.10 questing | Not affected | | 25.04 plucky | Not affected | | 24.10 oracular | Ignored end of life, was needs-triage | | 24.04 LTS noble | Not affected | | 22.04 LTS jammy | Not in release | | 20.04 LTS focal | Not in release | | mariadb-10.0 | 26.04 LTS resolute | Not in release | | 25.10 questing | Not in release | | 25.04 plucky | Not in release | | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 22.04 LTS jammy | Not in release | | 20.04 LTS focal | Not in release | | 16.04 LTS xenial | Not affected | | mariadb-10.1 | 26.04 LTS resolute | Not in release | | 25.10 questing | Not in release | | 25.04 plucky | Not in release | | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 22.04 LTS jammy | Not in release | | 20.04 LTS focal | Not in release | | 18.04 LTS bionic | Not affected | | mariadb-10.3 | 26.04 LTS resolute | Not in release | | 25.10 questing | Not in release | | 25.04 plucky | Not in release | | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 22.04 LTS jammy | Not in release | | 20.04 LTS focal | Not affected | | mariadb-10.6 | 26.04 LTS resolute | Not in release | | 25.10 questing | Not in release | | 25.04 plucky | Not in release | | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 22.04 LTS jammy | Not affected | | 20.04 LTS focal | Not in release | | mysql-5.5 | 26.04 LTS resolute | Not in release | | 25.10 questing | Not in release | | 25.04 plucky | Not in release | | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 22.04 LTS jammy | Not in release | | 20.04 LTS focal | Not in release | | 14.04 LTS trusty | Ignored see notes | | mysql-5.7 | 26.04 LTS resolute | Not in release | | 25.10 questing | Not in release | | 25.04 plucky | Not in release | | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 22.04 LTS jammy | Not in release | | 20.04 LTS focal | Not in release | | 18.04 LTS bionic | Ignored see notes | | 16.04 LTS xenial | Ignored end of ESM support, was ignored [see notes] | | mysql-8.0 | 26.04 LTS resolute | Not in release | | 25.10 questing | Not in release | | 25.04 plucky | Not in release | | 24.10 oracular | Fixed 8.0.41-0ubuntu0.24.10.1 | | 24.04 LTS noble | Fixed 8.0.41-0ubuntu0.24.04.1 | | 22.04 LTS jammy | Fixed 8.0.41-0ubuntu0.22.04.1 | | 20.04 LTS focal | Fixed 8.0.41-0ubuntu0.20.04.1 | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) ## Notes --- ### [iconstantin](https://launchpad.net/~iconstantin) since mysql versions 5.7 and earlier are no longer supported upstream, we are unable to update them to address security issues, marking as ignored. mariadb 5.5, 10.0, 10.1, and 10.3 are end of life and no longer supported upstream - marking as ignored. ## Severity score breakdown CVSS version: CVSS v3.0 **Base score** 5.5 · Medium * Base metrics | Parameter | Value | | --- | --- | | Attack vector | Network | | Attack complexity | Low | | Privileges required | High | | User interaction | None | | Scope | Unchanged | | Confidentiality impact | None | | Integrity impact | Low | | Availability impact | High | * Scores | Parameter | Value | | --- | --- | | Base score | 5.5 · Medium | | Exploitability score | - | | Impact score | - | **Vector:** CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-21555) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2025-21555) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2025-21555) * [Debian](https://security-tracker.debian.org/tracker/CVE-2025-21555) ### Related Ubuntu Security Notices (USN) + [USN-7245-1](https://usn.ubuntu.com/USN-7245-1) + MySQL vulnerabilities + 30 January 2025 ### Other references * *