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Fencer Vulns
medium 5.9

CVE-2021-2011 json

Vulnerability in the MySQL Client product of Oracle MySQL (component: C API).

published 2021-01-20 5 y ago modified 2026-09-08 2 mo ago also BIT-mariadb-2021-2011 , BIT-mariadb-min-2021-2011 , BIT-mysql-client-2021-2011 , EUVD-2021-16470

cvss
5.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.1%
EPSS 3.1% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

Vulnerability in the MySQL Client product of Oracle MySQL (component: C API). Supported versions that are affected are 5.7.32 and prior and 8.0.22 and prior. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Client. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Client. CVSS 3.1 Base Score 5.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H).

Patch / fix

  • bitnami mariadb 5.5.61, 10.0.35, 10.1.33, 10.2.15
  • bitnami mariadb-min 5.5.61, 10.0.35, 10.1.33, 10.2.15
  • bitnami mysql-client 5.5.61, 10.0.35, 10.1.33, 10.2.15
  • mariadb mariadb 5.5.61, 10.0.35, 10.1.33, 10.2.15
  • mysql-5.7 Ubuntu 16.04 LTS 5.7.33-0ubuntu0.16.04.1
  • mysql-5.7 Ubuntu 18.04 LTS 5.7.33-0ubuntu0.18.04.1
  • mysql-8.0 Ubuntu 20.04 LTS 8.0.23-0ubuntu0.20.04.1

ubuntu advisories UBUNTU-CVE-2021-2011

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 0.996-1.module+el8.0.0+3898+e09bb8de.9
  • mysql RHEL 8 8.0.26-1.module+el8.4.0+12359+b8928c02
  • mysql-libs RHEL 8 8.0.26-1.module+el8.4.0+12359+b8928c02
  • mysql-test RHEL 8 8.0.26-1.module+el8.4.0+12359+b8928c02
  • mecab-ipadic RHEL 8 2.7.0.20070801-16.module+el8.0.0+3898+e09bb8de
  • mysql-common RHEL 8 8.0.26-1.module+el8.4.0+12359+b8928c02
  • mysql-errmsg RHEL 8 8.0.26-1.module+el8.4.0+12359+b8928c02
  • mysql-server RHEL 8 8.0.26-1.module+el8.4.0+12359+b8928c02

red hat advisories RHSA-2021:3590RHSA-2021:3811RHSA-2019:2327

  • 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
  • mysql AlmaLinux 8 8.0.26-1.module_el8.4.0+2532+b8928c02
  • mysql AlmaLinux 8 8.0.26-1.module_el8.5.0+33+8bc5f36a
  • mysql-libs AlmaLinux 8 8.0.26-1.module_el8.4.0+2532+b8928c02
  • mysql-libs AlmaLinux 8 8.0.26-1.module_el8.5.0+33+8bc5f36a
  • mysql-test AlmaLinux 8 8.0.26-1.module_el8.4.0+2532+b8928c02
  • mysql-test AlmaLinux 8 8.0.26-1.module_el8.5.0+33+8bc5f36a

almalinux advisories ALSA-2021:3590

  • mecab Rocky Linux 8 0.996-1.module+el8.3.0+242+87d3366a.9
  • mysql Rocky Linux 8 8.0.26-1.module+el8.4.0+652+6de068a7
  • mecab-ipadic Rocky Linux 8 2.7.0.20070801-16.module+el8.3.0+242+87d3366a

rocky linux advisories RLSA-2021:3590

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-2021-2011 updated cvss 5.9

mysql: C API unspecified vulnerability (CPU Jan 2021)

  • Red Hat OpenStack Platform 10 (Newton) mariadb-galera, mariadb-galera-common, mariadb-galera-server
    affected: no fix planned “Out of support scope”
  • Red Hat OpenStack Platform 13 (Queens) mariadb, mariadb-libs, mariadb-test, mariadb-common, mariadb-config, mariadb-errmsg, +3 more
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 8) mecab 0.996-1.module+el8.0.0+3898+e09bb8de.9, mysql 8.0.26-1.module+el8.4.0+12359+b8928c02, mysql-libs 8.0.26-1.module+el8.4.0+12359+b8928c02, mysql-test 8.0.26-1.module+el8.4.0+12359+b8928c02, mysql-common 8.0.26-1.module+el8.4.0+12359+b8928c02, mysql-errmsg 8.0.26-1.module+el8.4.0+12359+b8928c02, +3 more
    fixed: vendor fix RHSA-2021:3590
  • Red Hat Enterprise Linux Client (v. 7) mariadb 5.5.64-1.el7, mariadb-libs 5.5.64-1.el7, mariadb-server 5.5.64-1.el7 Red Hat Enterprise Linux Client Optional (v. 7) mariadb-test 5.5.64-1.el7, mariadb-bench 5.5.64-1.el7, mariadb-embedded 5.5.64-1.el7 Red Hat Enterprise Linux ComputeNode (v. 7) mariadb 5.5.64-1.el7, mariadb-libs 5.5.64-1.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) mariadb-test 5.5.64-1.el7, mariadb-bench 5.5.64-1.el7, mariadb-server 5.5.64-1.el7, mariadb-embedded 5.5.64-1.el7 Red Hat Enterprise Linux Server (v. 7) mariadb 5.5.64-1.el7, mariadb-libs 5.5.64-1.el7, mariadb-test 5.5.64-1.el7, mariadb-bench 5.5.64-1.el7, mariadb-server 5.5.64-1.el7 Red Hat Enterprise Linux Server Optional (v. 7) mariadb-embedded 5.5.64-1.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) mariadb 5.5.64-1.el7, mariadb-libs 5.5.64-1.el7, mariadb-test 5.5.64-1.el7, mariadb-bench 5.5.64-1.el7, mariadb-server 5.5.64-1.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) mariadb-embedded 5.5.64-1.el7
    fixed: vendor fix RHSA-2019:2327
  • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-mysql80-mysql 8.0.26-1.el7, rh-mysql80-mysql-test 8.0.26-1.el7, rh-mysql80-mysql-common 8.0.26-1.el7, rh-mysql80-mysql-config 8.0.26-1.el7, rh-mysql80-mysql-errmsg 8.0.26-1.el7, rh-mysql80-mysql-server 8.0.26-1.el7, +3 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) rh-mysql80-mysql 8.0.26-1.el7, rh-mysql80-mysql-test 8.0.26-1.el7, rh-mysql80-mysql-common 8.0.26-1.el7, rh-mysql80-mysql-config 8.0.26-1.el7, rh-mysql80-mysql-errmsg 8.0.26-1.el7, rh-mysql80-mysql-server 8.0.26-1.el7, +3 more Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-mysql80-mysql 8.0.26-1.el7, rh-mysql80-mysql-test 8.0.26-1.el7, rh-mysql80-mysql-common 8.0.26-1.el7, rh-mysql80-mysql-config 8.0.26-1.el7, rh-mysql80-mysql-errmsg 8.0.26-1.el7, rh-mysql80-mysql-server 8.0.26-1.el7, +3 more
    fixed: vendor fix RHSA-2021:3811
  • Red Hat Enterprise Linux 6 mysql, mysql-libs, mysql-test, mysql-bench, mysql-server, mysql-embedded Red Hat Enterprise Linux 8 Judy, galera, mariadb, mariadb-pam, mariadb-test, mariadb-backup, +10 more Red Hat Software Collections rh-mariadb103-mariadb, rh-mariadb103-mariadb-test, rh-mariadb103-mariadb-backup, rh-mariadb103-mariadb-common, rh-mariadb103-mariadb-config, rh-mariadb103-mariadb-errmsg, +12 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 ICSA-26-027-02 updated cvss 5.9

Festo Didactic SE MES PC

  • Festo Didactic SE MES PC shipped_with_Windows_10
    affected: vendor fix

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

3.09% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 7.1 AV:N/AC:M/Au:N/C:N/I:N/A:C
OSV 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
bitnami mariadb
>=5.5.0, <5.5.61
>=10.0.0, <10.0.35
>=10.1.0, <10.1.33
>=10.2.0, <10.2.15
5.5.61
10.0.35
10.1.33
10.2.15
bitnami mariadb-min
>=5.5.0, <5.5.61
>=10.0.0, <10.0.35
>=10.1.0, <10.1.33
>=10.2.0, <10.2.15
5.5.61
10.0.35
10.1.33
10.2.15
bitnami mysql-client
>=5.5.0, <5.5.61
>=10.0.0, <10.0.35
>=10.1.0, <10.1.33
>=10.2.0, <10.2.15
5.5.61
10.0.35
10.1.33
10.2.15

Affected products

  • Oracle Corporation MySQL Server

Classification

Technology feeds

References

Sources

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.