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TI-2021-01844 Aliases CVE-2021-2166GHSA-9pgh-f42j-q89p

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

Priority LOW 30Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 10 fixed, 3 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DML). Supported versions that are affected are 5.7.33 and prior and 8.0.23 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).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.04909 92nd percentileScored 2026-11-07
Fix Partial Red Hat: 8 advisoriesRed Hat: 10 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OracleMySQL Serverup to 5.7.33; up to 8.0.23—No fix listedCNA
  • MySQL Server VendorOracle Affected up to 5.7.33; up to 8.0.23 Fixed in — No fix listed CNA

CPE configurations NVD · 10

CPEVersionsRoleVendor
cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*5.7.0 – 5.7.33; 8.0 – 8.0.23VulnerableOracle
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*32VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*33VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*34VulnerableFedoraproject
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:mariadb:mariadb:*:*:*:*:*:*:*:*10.2.0 to before 10.2.38; 10.3.0 to before 10.3.29; 10.4.0 to before 10.4.19; 10.5.0 to before 10.5.10VulnerableMariaDB
  • cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:* Versions 5.7.0 – 5.7.33; 8.0 – 8.0.23 Vulnerable ·Oracle
  • cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
  • cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:mariadb:mariadb:*:*:*:*:*:*:*:* Versions 10.2.0 to before 10.2.38; 10.3.0 to before 10.3.29; 10.4.0 to before 10.4.19; 10.5.0 to before 10.5.10 Vulnerable ·MariaDB

Remediation

Red Hat 8 advisories

  • RHSA-2023:6821 Released 2023-11-08 · Red Hat rating Important
    mariadb:10.5 security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) Judy-1.0.5-18.module+el8.4.0+9031+9abc7af9.src::mariadb:10.5, Judy-1.0.5-18.module+el8.4.0+9031+9abc7af9.x86_64::mariadb:10.5, galera-26.4.14-1.module+el8.4.0+20291+fd32d29c.src::mariadb:10.5 +16
    • Red Hat Enterprise Linux AppStream E4S (v.8.4) Judy-1.0.5-18.module+el8.4.0+9031+9abc7af9.aarch64::mariadb:10.5, Judy-1.0.5-18.module+el8.4.0+9031+9abc7af9.ppc64le::mariadb:10.5, Judy-1.0.5-18.module+el8.4.0+9031+9abc7af9.s390x::mariadb:10.5 +47
    • Red Hat Enterprise Linux AppStream TUS (v.8.4) Judy-1.0.5-18.module+el8.4.0+9031+9abc7af9.src::mariadb:10.5, Judy-1.0.5-18.module+el8.4.0+9031+9abc7af9.x86_64::mariadb:10.5, galera-26.4.14-1.module+el8.4.0+20291+fd32d29c.src::mariadb:10.5 +16
  • RHSA-2022:4818 Released 2022-05-31 · Red Hat rating Moderate
    mariadb:10.3 security and bug fix update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) Judy-1.0.5-18.module+el8+2765+cfa4f87b.aarch64::mariadb:10.3, Judy-1.0.5-18.module+el8+2765+cfa4f87b.ppc64le::mariadb:10.3, Judy-1.0.5-18.module+el8+2765+cfa4f87b.s390x::mariadb:10.3 +47
  • RHSA-2022:1556 Released 2022-04-26 · Red Hat rating Moderate
    mariadb:10.3 security and bug fix update
    • Red Hat Enterprise Linux AppStream (v. 8) Judy-1.0.5-18.module+el8+2765+cfa4f87b.aarch64::mariadb:10.3, Judy-1.0.5-18.module+el8+2765+cfa4f87b.ppc64le::mariadb:10.3, Judy-1.0.5-18.module+el8+2765+cfa4f87b.s390x::mariadb:10.3 +47
Show 5 more Red Hat advisories
  • RHSA-2022:1557 Released 2022-04-26 · Red Hat rating Moderate
    mariadb:10.5 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) Judy-1.0.5-18.module+el8.4.0+9031+9abc7af9.aarch64::mariadb:10.5, Judy-1.0.5-18.module+el8.4.0+9031+9abc7af9.ppc64le::mariadb:10.5, Judy-1.0.5-18.module+el8.4.0+9031+9abc7af9.s390x::mariadb:10.5 +47
  • RHSA-2022:1010 Released 2022-03-22 · Red Hat rating Moderate
    rh-mariadb103-mariadb security and bug fix update
    • Red Hat Software Collections for RHEL Workstation(v. 7) rh-mariadb103-galera-25.3.34-4.el7, rh-mariadb103-mariadb-3:10.3.32-2.el7, rh-mariadb103-mariadb-backup-3:10.3.32-2.el7 +17
    • Red Hat Software Collections for RHEL(v. 7) rh-mariadb103-galera-25.3.34-4.el7, rh-mariadb103-mariadb-3:10.3.32-2.el7, rh-mariadb103-mariadb-backup-3:10.3.32-2.el7 +17
  • RHSA-2022:1007 Released 2022-03-22 · Red Hat rating Moderate
    rh-mariadb105-mariadb security and bug fix update
    • Red Hat Software Collections for RHEL Workstation(v. 7) rh-mariadb105-galera-26.4.9-3.el7, rh-mariadb105-mariadb-3:10.5.13-1.el7, rh-mariadb105-mariadb-backup-3:10.5.13-1.el7 +19
    • Red Hat Software Collections for RHEL(v. 7) rh-mariadb105-galera-26.4.9-3.el7, rh-mariadb105-mariadb-3:10.5.13-1.el7, rh-mariadb105-mariadb-backup-3:10.5.13-1.el7 +19
  • RHSA-2021:3811 Released 2021-10-12 · Red Hat rating Moderate
    rh-mysql80-mysql security, bug fix, and enhancement update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-mysql80-mysql-8.0.26-1.el7, rh-mysql80-mysql-common-8.0.26-1.el7, rh-mysql80-mysql-config-8.0.26-1.el7 +7
    • 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-common-8.0.26-1.el7, rh-mysql80-mysql-config-8.0.26-1.el7 +7
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-mysql80-mysql-8.0.26-1.el7, rh-mysql80-mysql-common-8.0.26-1.el7, rh-mysql80-mysql-config-8.0.26-1.el7 +7
  • RHSA-2021:3590 Released 2021-09-21 · Red Hat rating Moderate
    mysql:8.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) mecab-0.996-1.module+el8.0.0+3898+e09bb8de.9.aarch64::mysql:8.0, mecab-0.996-1.module+el8.0.0+3898+e09bb8de.9.ppc64le::mysql:8.0, mecab-0.996-1.module+el8.0.0+3898+e09bb8de.9.s390x::mysql:8.0 +40

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Oracle MySQL Server — FEDORA-2021-01189f6361

    14 records Highest priority Priority LOW 14 LOW

    Other records, highest priority first

    • TI-2021-01854 Vulnerability in the MySQL Server product of Oracle MySQL (component: Server…Priority LOW 33
    • TI-2021-01849 Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DML).Priority LOW 33
    • TI-2021-01856 Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB).Priority LOW 28
    Show all 14 records → Advisory →
  • Advisory ·

    Oracle MySQL Server — FEDORA-2021-b8b7829a83

    14 records Highest priority Priority LOW 14 LOW

    Other records, highest priority first

    • TI-2021-01854 Vulnerability in the MySQL Server product of Oracle MySQL (component: Server…Priority LOW 33
    • TI-2021-01849 Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DML).Priority LOW 33
    • TI-2021-01856 Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB).Priority LOW 28
    Show all 14 records → Advisory →
Show 4 more groups
  • Advisory ·

    Oracle MySQL Server — FEDORA-2021-5b6c69a73a

    14 records Highest priority Priority LOW 14 LOW

    Other records, highest priority first

    • TI-2021-01854 Vulnerability in the MySQL Server product of Oracle MySQL (component: Server…Priority LOW 33
    • TI-2021-01849 Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DML).Priority LOW 33
    • TI-2021-01856 Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB).Priority LOW 28
    Show all 14 records → Advisory →
  • Advisory ·

    Oracle MySQL Server — FEDORA-2021-68db93b130

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2021-01833 Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DML).Priority LOW 27
    Show all 2 records → Advisory →
  • Advisory ·

    Oracle MySQL Server — FEDORA-2021-27187ac9dd

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2021-01833 Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DML).Priority LOW 27
    Show all 2 records → Advisory →
  • Advisory ·

    Oracle MySQL Server — FEDORA-2021-179f2fbb88

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2021-01833 Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DML).Priority LOW 27
    Show all 2 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat OpenStack Platform 10 (Newton)AffectedNo fix planned: Out of support scope
Red Hat OpenStack Platform 13 (Queens)AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2021:3590, RHSA-2022:1556, RHSA-2022:1557
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2023:6821
Red Hat Enterprise Linux AppStream E4S (v.8.4)Fixed RHSA-2023:6821
Red Hat Enterprise Linux AppStream EUS (v.8.4)Fixed RHSA-2022:4818
Red Hat Enterprise Linux AppStream TUS (v.8.4)Fixed RHSA-2023:6821
Red Hat Software Collections for RHEL Workstation(v. 7)Fixed RHSA-2022:1007, RHSA-2022:1010
Red Hat Software Collections for RHEL(v. 7)Fixed RHSA-2022:1007, RHSA-2022:1010
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2021:3811
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7)Fixed RHSA-2021:3811
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2021:3811
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-2166
  2. 2026-10-03 Alias added: GHSA-9pgh-f42j-q89p

References

Advisory 10

  • TI-2017-02794 Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server… CVSS 3.0HIGH 7.5
  • TI-2016-05707 Oracle MySQL through 5.5.52, 5.6.x through 5.6.33, and 5.7.x through 5.7.15; MariaDB… CVSS 3.0CRITICAL 9.8
  • TI-2003-00723 Buffer overflow in get_salt_from_password from sql_acl.cc for MySQL 4.0.14 and earlier… CVSS 2.0HIGH 9.0
  • TI-2020-04444 RFD Attack via "Content-Disposition" Header Sourced from Request Input by Spring MVC or Spring WebFlux Application CVSS 3.1HIGH 7.5
  • TI-2008-00208 Multiple buffer overflows in yaSSL 1.7.5 and earlier, as used in MySQL and possibly other… CVSS 2.0HIGH 7.5
  • TI-2020-01888 Segmentation fault in SSL_check_chain CVSS 3.1HIGH 7.5
See all 1327 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences