CVE-2024-20985Network attack vector

Authenticated server hang or crash

Published Jan 16, 2024 · Updated Jun 20, 2025

Denial of service in Oracle MySQL Server's UDF component allows remote authenticated users to repeatedly crash or hang the server. Oracle identifies the affected locus only as Server: UDF and has not published the malformed input, function, or incorrect operation that triggers the failure. Low-privileged network access is sufficient; supported 8.0 releases through 8.0.35 and 8.2.0 are affected, with no reported confidentiality or integrity impact.

CVSS severity6.5
Medium
EPSS probability1.10%
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 Oracle MySQL Server's UDF component allows remote authenticated users to repeatedly crash or hang the server. Oracle identifies the affected locus only as Server: UDF and has not published the malformed input, function, or incorrect operation that triggers the failure. Low-privileged network access is sufficient; supported 8.0 releases through 8.0.35 and 8.2.0 are affected, with no reported confidentiality or integrity impact.

The record

CVE
CVE-2024-20985
Published
Jan 16, 2024
Updated
Jun 20, 2025
Vendor
Oracle Corporation
Product
MySQL Server
Classifications
T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 20, 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=* <=8.0.35
  2. Affected versionversion=* <=8.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Oracle Corporation · MySQL Serverversion=* <=8.0.35; version=* <=8.2.0

Published CVSS scores

6.5Oracle CorporationCVSS:3.1/AV:N/AC:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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