Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer).

published 2020-07-15 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-6683

cvss: 4.9; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 2.5%; EPSS 2.5% chance of exploitation in 30 days, percentile 85%
public exploits: 0; none known

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 5.7.30 and prior and 8.0.20 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 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

Patch / fix

distros 4

ubuntu red hat almalinux rocky linux

mysql-5.7 Ubuntu 16.04 LTS 5.7.31-0ubuntu0.16.04.1
mysql-5.7 Ubuntu 18.04 LTS 5.7.31-0ubuntu0.18.04.1
mysql-8.0 Ubuntu 20.04 LTS 8.0.21-0ubuntu0.20.04.3

ubuntu advisories UBUNTU-CVE-2020-14547

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

mecab RHEL 8, RHEL 8.1 EUS, RHEL 8.0 E4S 0.996-1.module+el8.0.0+3898+e09bb8de.9
mysql RHEL 8 8.0.21-1.module+el8.2.0+7855+47abd494
mysql-libs RHEL 8 8.0.21-1.module+el8.2.0+7855+47abd494
mysql-test RHEL 8 8.0.21-1.module+el8.2.0+7855+47abd494
mecab-ipadic RHEL 8, RHEL 8.1 EUS, RHEL 8.0 E4S 2.7.0.20070801-16.module+el8.0.0+3898+e09bb8de
mysql-common RHEL 8 8.0.21-1.module+el8.2.0+7855+47abd494
mysql-errmsg RHEL 8 8.0.21-1.module+el8.2.0+7855+47abd494
mysql-server RHEL 8 8.0.21-1.module+el8.2.0+7855+47abd494

red hat advisories RHSA-2020:3732 RHSA-2020:3518 RHSA-2020:3757 RHSA-2020:3755

mecab AlmaLinux 8 0.996-1.module_el8.4.0+2532+b8928c02.9
mecab AlmaLinux 8 0.996-1.module_el8.5.0+33+8bc5f36a.9
mecab-ipadic AlmaLinux 8 2.7.0.20070801-16.module_el8.5.0+33+8bc5f36a
mecab-ipadic AlmaLinux 8 2.7.0.20070801-16.module_el8.4.0+2532+b8928c02
mecab-ipadic-EUCJP AlmaLinux 8 2.7.0.20070801-16.module_el8.5.0+33+8bc5f36a
mecab-ipadic-EUCJP AlmaLinux 8 2.7.0.20070801-16.module_el8.4.0+2532+b8928c02

almalinux advisories ALSA-2020:3732

mecab Rocky Linux 8 0.996-1.module+el8.3.0+242+87d3366a.9
mysql Rocky Linux 8 8.0.21-1.module+el8.3.0+242+87d3366a
mecab-ipadic Rocky Linux 8 2.7.0.20070801-16.module+el8.3.0+242+87d3366a

rocky linux advisories RLSA-2020:3732

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-14547 updated 2026-11-06 cvss 4.9

mysql: Server: Optimizer unspecified vulnerability (CPU Jul 2020)

Red Hat Enterprise Linux AppStream (v. 8) mysql 8.0.21-1.module+el8.2.0+7855+47abd494, mecab 0.996-1.module+el8.0.0+3898+e09bb8de.9, mysql-libs 8.0.21-1.module+el8.2.0+7855+47abd494, mysql-test 8.0.21-1.module+el8.2.0+7855+47abd494, mysql-common 8.0.21-1.module+el8.2.0+7855+47abd494, mysql-errmsg 8.0.21-1.module+el8.2.0+7855+47abd494, +3 more
fixed: vendor fix RHSA-2020:3732
Red Hat Enterprise Linux AppStream E4S (v. 8.0) mysql 8.0.21-1.module+el8.0.0+7853+3a2b0b25, mecab 0.996-1.module+el8.0.0+3898+e09bb8de.9, mysql-libs 8.0.21-1.module+el8.0.0+7853+3a2b0b25, mysql-test 8.0.21-1.module+el8.0.0+7853+3a2b0b25, mysql-common 8.0.21-1.module+el8.0.0+7853+3a2b0b25, mysql-errmsg 8.0.21-1.module+el8.0.0+7853+3a2b0b25, +3 more
fixed: vendor fix RHSA-2020:3755
Red Hat Enterprise Linux AppStream EUS (v. 8.1) mysql 8.0.21-1.module+el8.1.0+7854+62e1520f, mecab 0.996-1.module+el8.0.0+3898+e09bb8de.9, mysql-libs 8.0.21-1.module+el8.1.0+7854+62e1520f, mysql-test 8.0.21-1.module+el8.1.0+7854+62e1520f, mysql-common 8.0.21-1.module+el8.1.0+7854+62e1520f, mysql-errmsg 8.0.21-1.module+el8.1.0+7854+62e1520f, +3 more
fixed: vendor fix RHSA-2020:3757
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-mysql80-mysql 8.0.21-1.el7, rh-mysql80-mysql-test 8.0.21-1.el7, rh-mysql80-mysql-common 8.0.21-1.el7, rh-mysql80-mysql-config 8.0.21-1.el7, rh-mysql80-mysql-errmsg 8.0.21-1.el7, rh-mysql80-mysql-server 8.0.21-1.el7, +3 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-mysql80-mysql 8.0.21-1.el7, rh-mysql80-mysql-test 8.0.21-1.el7, rh-mysql80-mysql-common 8.0.21-1.el7, rh-mysql80-mysql-config 8.0.21-1.el7, rh-mysql80-mysql-errmsg 8.0.21-1.el7, rh-mysql80-mysql-server 8.0.21-1.el7, +3 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) rh-mysql80-mysql 8.0.21-1.el7, rh-mysql80-mysql-test 8.0.21-1.el7, rh-mysql80-mysql-common 8.0.21-1.el7, rh-mysql80-mysql-config 8.0.21-1.el7, rh-mysql80-mysql-errmsg 8.0.21-1.el7, rh-mysql80-mysql-server 8.0.21-1.el7, +3 more Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-mysql80-mysql 8.0.21-1.el7, rh-mysql80-mysql-test 8.0.21-1.el7, rh-mysql80-mysql-common 8.0.21-1.el7, rh-mysql80-mysql-config 8.0.21-1.el7, rh-mysql80-mysql-errmsg 8.0.21-1.el7, rh-mysql80-mysql-server 8.0.21-1.el7, +3 more
fixed: vendor fix RHSA-2020:3518
Red Hat Enterprise Linux 5 mysql55-mysql Red Hat Enterprise Linux 6 mysql, mysql-libs, mysql-test, mysql-bench, mysql-server, mysql-embedded Red Hat Enterprise Linux 7 mariadb, mariadb-libs, mariadb-test, mariadb-bench, mariadb-server, mariadb-embedded Red Hat Enterprise Linux 8 Judy, galera, mariadb, mariadb-pam, mariadb-test, mariadb-backup, +8 more Red Hat OpenStack Platform 10 (Newton) mariadb-galera, mariadb-galera-common, mariadb-galera-server Red Hat OpenStack Platform 13 (Queens) mariadb, mariadb-libs, mariadb-test, mariadb-common, mariadb-config, mariadb-errmsg, +3 more

+1 more productsfewer

Red Hat Software Collections rh-mariadb102-mariadb, rh-mariadb103-mariadb, rh-mariadb102-mariadb-test, rh-mariadb103-mariadb-test, rh-mariadb102-mariadb-bench, rh-mariadb102-mariadb-backup, +31 more

not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-09-27)

Exploit prediction

2.54% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.9	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
NVD	3.1	4.9	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	4.0	AV:N/AC:L/Au:S/C:N/I:N/A:P

Affected products

Oracle Corporation MySQL Server

Classification

Technology feeds

MySQL rss critical rss

References

usn.ubuntu.com /4441-1/
vendor-advisory, third-party-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/CAI7GRYZ5265JVKHC6VXI57MNJDDB63C/
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/HYQPCHGCVKFS3H226QQKZFQP56JYOQ3T/
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/SA2XMR2ZY2BPR3VLTDVLNV74JL7TA7KL/
vendor-advisory
security.gentoo.org /glsa/202105-27
vendor-advisory, third-party-advisory
oracle.com /security-alerts/cpujul2020.html
vendor-advisory
security.netapp.com /advisory/ntap-20200717-0004/
third-party-advisory

Sources

CVE List CVE-2020-14547
NVD CVE-2020-14547

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary