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Fencer Vulns
medium 6.5

CVE-2025-21501 json

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

published 2025-01-21 21 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-2490

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits
0
none known

Summary

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.40 and prior, 8.4.3 and prior and 9.1.0 and prior. Easily exploitable vulnerability allows low 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 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

Patch / fix

  • oracle mysql 8.0.41, 8.4.4, 9.1.1
  • oracle mysql_server 8.0.41, 8.4.4, 9.1.1
  • mysql-8.0 Ubuntu 20.04 LTS 8.0.41-0ubuntu0.20.04.1
  • mysql-8.0 Ubuntu 22.04 LTS 8.0.41-0ubuntu0.22.04.1
  • mysql-8.0 Ubuntu 24.04 LTS 8.0.41-0ubuntu0.24.04.1

ubuntu advisories UBUNTU-CVE-2025-21501

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

  • mysql RHEL 9 8.0.41-2.el9_5
  • mysql-libs RHEL 9 8.0.41-2.el9_5
  • mysql-test RHEL 9 8.0.41-2.el9_5
  • mysql-common RHEL 9 8.0.41-2.el9_5
  • mysql-errmsg RHEL 9 8.0.41-2.el9_5
  • mysql-server RHEL 9 8.0.41-2.el9_5
  • mecab RHEL 8 0.996-2.module+el8.10.0+22857+7f331edd
  • mysql RHEL 8 8.0.41-1.module+el8.10.0+22857+7f331edd

red hat advisories RHSA-2025:1671RHSA-2025:1673

  • mysql AlmaLinux 9 8.0.41-2.el9_5
  • mysql-libs AlmaLinux 9 8.0.41-2.el9_5
  • mysql-test AlmaLinux 9 8.0.41-2.el9_5
  • mysql-common AlmaLinux 9 8.0.41-2.el9_5
  • mysql-errmsg AlmaLinux 9 8.0.41-2.el9_5
  • mysql-server AlmaLinux 9 8.0.41-2.el9_5
  • mecab AlmaLinux 8 0.996-2.module_el8.10.0+3965+b415b607
  • mecab AlmaLinux 8 0.996-2.module_el8.6.0+3340+d764b636

almalinux advisories ALSA-2025:1671ALSA-2025:1673

  • mysql Rocky Linux 9 8.0.41-2.el9_5
  • mecab Rocky Linux 8 0.996-2.module+el8.10.0+1676+9b4b6e24
  • mysql Rocky Linux 8 8.0.41-1.module+el8.10.0+1937+28fbbc83.0.1
  • mecab-ipadic Rocky Linux 8 2.7.0.20070801-17.module+el8.10.0+1937+28fbbc83

rocky linux advisories RLSA-2025:1671RLSA-2025:1673

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-2025-21501 updated cvss 6.5

mysql: MySQL Server: Denial of Service vulnerability

  • Red Hat Enterprise Linux 10 mysql8.4
    affected: workaround, no fix available “Restrict network access to the MySQL Server to trusted clients only.”
  • Red Hat CodeReady Linux Builder (v. 9) mysql-libs 8.0.41-2.el9_5, mysql-test 8.0.41-2.el9_5
    fixed: vendor fix “Restrict network access to the MySQL Server to trusted clients only.” RHSA-2025:1671
  • Red Hat Enterprise Linux AppStream (v. 8) mecab 0.996-2.module+el8.10.0+22857+7f331edd, mysql 8.0.41-1.module+el8.10.0+22857+7f331edd, mysql-libs 8.0.41-1.module+el8.10.0+22857+7f331edd, mysql-test 8.0.41-1.module+el8.10.0+22857+7f331edd, mysql-common 8.0.41-1.module+el8.10.0+22857+7f331edd, mysql-errmsg 8.0.41-1.module+el8.10.0+22857+7f331edd, +3 more
    fixed: vendor fix “Restrict network access to the MySQL Server to trusted clients only.” RHSA-2025:1673
  • Red Hat Enterprise Linux AppStream (v. 9) mysql 8.0.41-2.el9_5, mysql-common 8.0.41-2.el9_5, mysql-errmsg 8.0.41-2.el9_5, mysql-server 8.0.41-2.el9_5
    fixed: vendor fix “Restrict network access to the MySQL Server to trusted clients only.” RHSA-2025:1671
  • Red Hat Enterprise Linux 6 mysql, mysql-libs, mysql-test, mysql-bench, mysql-server, mysql-embedded
    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
21 mo ago

Exploit prediction

1.00% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Oracle Corporation MySQL Server

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling
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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.