Description
Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Optimizer). Supported versions that are affected are 5.7.20 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. CVSS 3.0 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Oracle | MySQL Server | 5.7.20 and prior | — |
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 18.04 LTS | mysql-5.7 | 5.7.21-1ubuntu1 | — |
| Ubuntu 16.04 LTS | mysql-5.7 | 5.7.21-0ubuntu0.16.04.1 | USN-3537-1 |
| Ubuntu 14.04 LTS | mysql-5.5 | 5.5.59-0ubuntu0.14.04.1 | USN-3537-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 3 | rh-mysql57-mysql +6 | 5.7.21-2.el6.1 | RHSA-2018:0586 |
Advisories 2
- RHSA-2018:0586 Red Hat Security Advisory: rh-mysql57-mysql security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-3537-1 mysql-5.5, mysql-5.7 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
References
- USN-3537-1 vendor-advisory
- RHSA-2018:0586 vendor-advisory
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
- 102685 vdb-entry
- https://security.netapp.com/advisory/ntap-20180117-0002/
- 1040216 vdb-entry