CVE-2023-30447Network attack vector

Service interruption via crafted table query

Published Jul 8, 2023 · Updated Feb 13, 2025

Denial of service in IBM Db2 for Linux, UNIX, and Windows 10.5, 11.1, and 11.5 allows remote attackers to interrupt service. A specially crafted query against certain tables triggers the failure, but IBM has not disclosed the affected Db2 function or faulty input operation. Current IBM scoring treats the network query as unauthenticated, and the reported consequence is limited to service availability.

CVSS severity5.9
Medium
EPSS probability1.34%
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 IBM Db2 for Linux, UNIX, and Windows 10.5, 11.1, and 11.5 allows remote attackers to interrupt service. A specially crafted query against certain tables triggers the failure, but IBM has not disclosed the affected Db2 function or faulty input operation. Current IBM scoring treats the network query as unauthenticated, and the reported consequence is limited to service availability.

The record

CVE
CVE-2023-30447
Published
Jul 8, 2023
Updated
Feb 13, 2025
Vendor
IBM
Product
IBM Db2 for Linux, UNIX, and Windows
Classifications
CWE-20, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 8, 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=10.5, 11.1, 11.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM Db2 for Linux, UNIX, and Windowsversion=10.5, 11.1, 11.5

Published CVSS scores

5.3IBM CorporationCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.9IBM CorporationCVSS:3.1/AV:N/AC:H/PR:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499Endpoint 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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