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01 Record

CVE-2025-21521

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Thread Pooling). Supported versions that are affected are 8.0.39 and prior, 8.4.2 and prior and 9.0.1 and prior. Easily

HighPUBLISHEDCNA: oracle
CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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02 Description

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Thread Pooling). Supported versions that are affected are 8.0.39 and prior, 8.4.2 and prior and 9.0.1 and prior. Easily

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
1.10% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 65.6% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2025-01-21 20:53Z1 YR AGO
Last updated
2025-11-03 20:57Z12 MO AGO
Reserved
2024-12-24
Assigning CNA
oracle
Record state
PUBLISHED
Severity
High (CVSS 7.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
  • CWE-770Allocation of Resources Without Limits or ThrottlingBase
  • CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')Base
Data version
5.2
Document digest
045cf82353ee23d5b348e3fbd515ec61f51420b1a5ab309a8caa271b3794a59d

05 Affected products

VendorProductVersionsPlatforms
Oracle CorporationMySQL Server* to 8.0.39, * to 8.4.2, * to 9.0.1—

06 References

07 Fixed in

AlmaLinux 8

  • mecab
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.996-2.module_el8.10.0+3965+b415b607
    • Affected before 0.996-2.module_el8.6.0+3340+d764b636
  • mecab-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.996-2.module_el8.10.0+3965+b415b607
    • Affected before 0.996-2.module_el8.6.0+3340+d764b636
  • mecab-ipadic
    Fixed in 2.7.0.20070801-17.module_el8.10.0+3965+b415b607
  • mecab-ipadic-EUCJP
    Fixed in 2.7.0.20070801-17.module_el8.10.0+3965+b415b607
  • mysql
    Fixed in 8.0.41-1.module_el8.10.0+3965+b415b607
  • mysql-common
    Fixed in 8.0.41-1.module_el8.10.0+3965+b415b607
  • mysql-devel
    Fixed in 8.0.41-1.module_el8.10.0+3965+b415b607
  • mysql-errmsg
    Fixed in 8.0.41-1.module_el8.10.0+3965+b415b607
  • mysql-libs
    Fixed in 8.0.41-1.module_el8.10.0+3965+b415b607
  • mysql-server
    Fixed in 8.0.41-1.module_el8.10.0+3965+b415b607
  • mysql-test
    Fixed in 8.0.41-1.module_el8.10.0+3965+b415b607

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • mysql
    Fixed in 8.0.41-2.el9_5
  • mysql-common
    Fixed in 8.0.41-2.el9_5
  • mysql-devel
    Fixed in 8.0.41-2.el9_5
  • mysql-errmsg
    Fixed in 8.0.41-2.el9_5
  • mysql-libs
    Fixed in 8.0.41-2.el9_5
  • mysql-server
    Fixed in 8.0.41-2.el9_5
  • mysql-test
    Fixed in 8.0.41-2.el9_5

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • mecab
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.996-2.module_el8.10.0+3965+b415b607
    • Affected before 0.996-2.module_el8.6.0+3340+d764b636
  • mecab-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.996-2.module_el8.10.0+3965+b415b607
    • Affected before 0.996-2.module_el8.6.0+3340+d764b636
  • mecab-ipadic
    Fixed in 2.7.0.20070801-17.module_el8.10.0+3965+b415b607
  • mecab-ipadic-EUCJP
    Fixed in 2.7.0.20070801-17.module_el8.10.0+3965+b415b607
  • mysql
    Fixed in 8.0.41-1.module_el8.10.0+3965+b415b607
  • mysql-common
    Fixed in 8.0.41-1.module_el8.10.0+3965+b415b607
  • mysql-devel
    Fixed in 8.0.41-1.module_el8.10.0+3965+b415b607
  • mysql-errmsg
    Fixed in 8.0.41-1.module_el8.10.0+3965+b415b607
  • mysql-libs
    Fixed in 8.0.41-1.module_el8.10.0+3965+b415b607
  • mysql-server
    Fixed in 8.0.41-1.module_el8.10.0+3965+b415b607
  • mysql-test
    Fixed in 8.0.41-1.module_el8.10.0+3965+b415b607

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • mysql
    Fixed in 8.0.41-2.el9_5
  • mysql-common
    Fixed in 8.0.41-2.el9_5
  • mysql-devel
    Fixed in 8.0.41-2.el9_5
  • mysql-errmsg
    Fixed in 8.0.41-2.el9_5
  • mysql-libs
    Fixed in 8.0.41-2.el9_5
  • mysql-server
    Fixed in 8.0.41-2.el9_5
  • mysql-test
    Fixed in 8.0.41-2.el9_5

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 14.04 LTS

  • mysql-5.5
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 16.04 LTS

  • percona-server-5.6
    No fix yet
  • percona-xtradb-cluster-5.6
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • mysql-8.0
    Fixed in 8.0.40-0ubuntu0.20.04.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • mysql-8.0
    Fixed in 8.0.40-0ubuntu0.22.04.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • mysql-8.0
    Fixed in 8.0.40-0ubuntu0.24.04.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • mysql-5.7
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • mysql-5.7
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.