CVE-2021-2011 — mysql: C API unspecified vulnerability (CPU Jan 2021)

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MEDIUM

mysql: C API unspecified vulnerability (CPU Jan 2021)

Published Jan 20, 2021

5.9

MEDIUM

CVSS 3.1

EPSS 3.03%

Description

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).

Affected products

Vendor Oracle Corporation Product MySQL Server Default
n/a
- Version
  5.7.32 and prior
  Status
  affected
  Constraints
  -
- Version
  8.0.22 and prior
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Oracle Corporation

MySQL Server

n/a

Version	Status	Constraints
5.7.32 and prior	affected	-
8.0.22 and prior	affected	-

Red Hat Enterprise Linux 7

mariadb-1:5.5.64-1.el7

Fixed · RHSA-2019:2327
Red Hat Enterprise Linux 8

mysql:8.0-8040020210824134700.522a0ee4

Fixed · RHSA-2021:3590
Red Hat Software Collections for Red Hat Enterprise Linux 7

rh-mysql80-mysql-0:8.0.26-1.el7

Fixed · RHSA-2021:3811
Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUS

rh-mysql80-mysql-0:8.0.26-1.el7

Fixed · RHSA-2021:3811
Red Hat Enterprise Linux 6

mysql

Not affected
Red Hat Enterprise Linux 8

mariadb-connector-c

Not affected
Red Hat Enterprise Linux 8

mariadb:10.3/mariadb

Not affected
Red Hat OpenStack Platform 10 (Newton)

mariadb-galera

Out of support scope
Red Hat OpenStack Platform 13 (Queens)

mariadb

Will not fix
Red Hat Software Collections

rh-mariadb103-mariadb

Not affected

Product	Package	State	Advisory
Red Hat Enterprise Linux 7	mariadb-1:5.5.64-1.el7	Fixed	RHSA-2019:2327
Red Hat Enterprise Linux 8	mysql:8.0-8040020210824134700.522a0ee4	Fixed	RHSA-2021:3590
Red Hat Software Collections for Red Hat Enterprise Linux 7	rh-mysql80-mysql-0:8.0.26-1.el7	Fixed	RHSA-2021:3811
Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUS	rh-mysql80-mysql-0:8.0.26-1.el7	Fixed	RHSA-2021:3811
Red Hat Enterprise Linux 6	mysql	Not affected	n/a
Red Hat Enterprise Linux 8	mariadb-connector-c	Not affected	n/a
Red Hat Enterprise Linux 8	mariadb:10.3/mariadb	Not affected	n/a
Red Hat OpenStack Platform 10 (Newton)	mariadb-galera	Out of support scope	n/a
Red Hat OpenStack Platform 13 (Queens)	mariadb	Will not fix	n/a
Red Hat Software Collections	rh-mariadb103-mariadb	Not affected	n/a

Remediation

No remediation recorded yet.

Metrics

3.03% 0.03028

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.03028

Score over time

2021–2026

EPSS v1
EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v1
EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (20 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	3.03% (0.03028)	87.02th	v5 (v2026.06.15)
Jun 15, 2026	3.04% (0.03039)	85.75th	v5 (v2026.06.15)
Nov 18, 2025	2.14% (0.02144)	82.84th	v4 (v2025.03.14)
Jul 20, 2024	0.27% (0.00273)	68.34th	v3 (v2023.03.01)
Feb 8, 2024	0.27% (0.00273)	67.11th	v3 (v2023.03.01)
Jan 9, 2024	0.27% (0.00273)	64.58th	v3 (v2023.03.01)
Nov 8, 2023	0.21% (0.00211)	58.81th	v3 (v2023.03.01)
Oct 6, 2023	0.23% (0.00229)	60.69th	v3 (v2023.03.01)
Aug 27, 2023	0.20% (0.00201)	57.21th	v3 (v2023.03.01)
Mar 7, 2023	0.14% (0.00136)	47.25th	v3 (v2023.03.01)
Mar 6, 2023	1.02% (0.01018)	40.69th	v2 (v2022.01.01)
Sep 10, 2022	1.02% (0.01018)	38.88th	v2 (v2022.01.01)
Apr 1, 2022	1.02% (0.01018)	36.86th	v2 (v2022.01.01)
Feb 4, 2022	7.18% (0.07176)	80.33th	v2 (v2022.01.01)
Feb 3, 2022	5.36% (0.05363)	79.74th	v1
Jan 6, 2022	5.36% (0.05363)	79.54th	v1
Sep 1, 2021	1.25% (0.01247)	68.62th	v1
Jun 22, 2021	1.25% (0.01247)	0.00th	v1
May 27, 2021	1.04% (0.01040)	0.00th	v1
Apr 14, 2021	0.83% (0.00833)	0.00th	v1

Weaknesses (0)

No CWE recorded.

References (10)

https://access.redhat.com/security/cve/CVE-2021-2011
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1922384
Issue Tracking
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CS5THZSGI7O2CZO44NWYE57AG2T7NK3K/
vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T7EAHJPWOOF4D6PEFLXW5IQWRRSZ3HRC/
vendor-advisoryx_refsource_FEDORA
https://nvd.nist.gov/vuln/detail/CVE-2021-2011
https://security.gentoo.org/glsa/202105-27
vendor-advisoryx_refsource_GENTOOThird Party Advisory
https://security.netapp.com/advisory/ntap-20210622-0001/
x_refsource_CONFIRMThird Party Advisory
https://www.cve.org/CVERecord?id=CVE-2021-2011
https://www.oracle.com/security-alerts/cpujan2021.html
x_refsource_MISCVendor Advisory
https://www.oracle.com/security-alerts/cpujan2021.html#AppendixMSQL

Link	Providers	Tags
https://access.redhat.com/security/cve/CVE-2021-2011		Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1922384		Issue Tracking
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CS5THZSGI7O2CZO44NWYE57AG2T7NK3K/		vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T7EAHJPWOOF4D6PEFLXW5IQWRRSZ3HRC/		vendor-advisoryx_refsource_FEDORA
https://nvd.nist.gov/vuln/detail/CVE-2021-2011
https://security.gentoo.org/glsa/202105-27		vendor-advisoryx_refsource_GENTOOThird Party Advisory
https://security.netapp.com/advisory/ntap-20210622-0001/		x_refsource_CONFIRMThird Party Advisory
https://www.cve.org/CVERecord?id=CVE-2021-2011
https://www.oracle.com/security-alerts/cpujan2021.html		x_refsource_MISCVendor Advisory
https://www.oracle.com/security-alerts/cpujan2021.html#AppendixMSQL