CVE-2018-2668: Canonical Ubuntu Linux

Medium severity, CVSS 6.5. EPSS: 4% chance of exploitation in the next 30 days.

Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Optimizer). Supported versions that are affected are 5.5.58 and prior, 5.6.38 and prior and 5.7.20 and prior. Easily exploitable vulnerability allows low 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 6.5 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 16.04 only; version 17.10 only
• Debian Debian Linux: version 7.0 only; version 8.0 only; version 9.0 only
• MariaDB MariaDB: from 5.5.0, before 5.5.59 (fixed in 5.5.59); from 10.0.0, before 10.0.34 (fixed in 10.0.34); from 10.1.0, before 10.1.31 (fixed in 10.1.31); from 10.2.0, before 10.2.13 (fixed in 10.2.13)
• Netapp Active Iq Unified Manager: from 7.3; from 9.5
• Netapp Oncommand Insight: affected versions not specified
• Netapp Oncommand Workflow Automation: affected versions not specified
• Netapp Snapcenter: affected versions not specified
• Oracle MySQL: from 5.5.0, up to and including 5.5.58; from 5.6.0, up to and including 5.6.38; from 5.7.0, up to and including 5.7.20
• Red Hat Enterprise Linux Desktop: version 7.0 only
• Red Hat Enterprise Linux Eus: version 7.5 only; version 7.6 only; version 7.7 only
• Red Hat Enterprise Linux Server: version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 7.6 only; version 7.7 only
• Red Hat Enterprise Linux Server Tus: version 7.6 only; version 7.7 only
• Red Hat Enterprise Linux Workstation: version 7.0 only
• Red Hat Openstack: version 12 only

Published 2018-01-18. Last modified 2026-06-17.