CVE-2022-21302Network attack vector

Low-privilege remote DoS via InnoDB protocol handling

Published Jan 19, 2022 · Updated Sep 24, 2024

MySQL Server through 8.0.27 allows remote authenticated users with low privileges to cause a service interrupt via the MySQL Protocol. Oracle identifies InnoDB as the affected component but has not publicly disclosed the specific faulty operation or request sequence. The attack requires network access and low-level database privileges; successful exploitation can hang the server or repeatedly crash it, with no reported confidentiality or integrity impact.

CVSS severity5.3
Medium
EPSS probability1.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

MySQL Server through 8.0.27 allows remote authenticated users with low privileges to cause a service interrupt via the MySQL Protocol. Oracle identifies InnoDB as the affected component but has not publicly disclosed the specific faulty operation or request sequence. The attack requires network access and low-level database privileges; successful exploitation can hang the server or repeatedly crash it, with no reported confidentiality or integrity impact.

The record

CVE
CVE-2022-21302
Published
Jan 19, 2022
Updated
Sep 24, 2024
Vendor
Oracle Corporation
Product
MySQL Server
Classifications
T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 19, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 2024Record 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=8.0.27 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Oracle Corporation · MySQL Serverversion=8.0.27 and prior

Published CVSS scores

5.3Oracle CorporationCVSS:3.1/AV:N/AC:H/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Network Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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