CVE-2017-3309: Debian Linux

High severity, CVSS 7.7. EPSS: 3.1% 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 5.5.54 and earlier, 5.6.35 and earlier and 5.7.17 and earlier. Easily "exploitable" vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server. While the vulnerability is in MySQL Server, attacks may significantly impact additional products. 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 7.7 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H).

Affected products

• Debian Debian Linux: version 8.0 only
• MariaDB MariaDB: from 5.5.0, before 5.5.55 (fixed in 5.5.55); from 10.0.0, before 10.0.31 (fixed in 10.0.31); from 10.1.0, before 10.1.23 (fixed in 10.1.23); from 10.2.0, before 10.2.6 (fixed in 10.2.6)
• Oracle MySQL: from 5.5.0, up to and including 5.5.54; from 5.6.0, up to and including 5.6.35; from 5.7.0, up to and including 5.7.17
• Red Hat Enterprise Linux Desktop: version 7.0 only
• Red Hat Enterprise Linux Eus: version 7.4 only; 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 7.4 only; 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

Published 2017-04-24. Last modified 2026-06-17.