CVE-2023-21911Network attack vector

Authenticated hang or crash via undisclosed InnoDB flaw

Published Apr 18, 2023 · Updated Feb 13, 2025

Denial of service in InnoDB in Oracle MySQL Server 8.0.32 and earlier allows remote authenticated users to hang or crash the server. Oracle has not published the malformed operation or InnoDB code path that triggers the failure through the MySQL protocol. Exploitation requires a highly privileged database account and can stop service repeatedly, without reported confidentiality or integrity impact.

CVSS severity4.9
Medium
EPSS probability1.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in InnoDB in Oracle MySQL Server 8.0.32 and earlier allows remote authenticated users to hang or crash the server. Oracle has not published the malformed operation or InnoDB code path that triggers the failure through the MySQL protocol. Exploitation requires a highly privileged database account and can stop service repeatedly, without reported confidentiality or integrity impact.

The record

CVE
CVE-2023-21911
Published
Apr 18, 2023
Updated
Feb 13, 2025
Vendor
Oracle Corporation
Product
MySQL Server
Classifications
T1489
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.0.32 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Oracle Corporation · MySQL Serverversion=8.0.32 and prior

Published CVSS scores

4.9Oracle CorporationCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1489Service Stop

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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