CVE-2025-2668Network attack vector

Authenticated server crash via crafted ALTER TABLE query

Published Jan 30, 2026 · Updated Jan 30, 2026

Denial of service in IBM Db2 11.5.0 through 11.5.9 allows remote authenticated users to crash the server via a crafted ALTER TABLE query. The ALTER TABLE processing path accepts an excessive size value for memory allocation; IBM has not disclosed the affected function or replication details. A valid database account is required, and the documented impact is a server crash without reported data disclosure or modification.

CVSS severity6.5
Medium
EPSS probability0.36%
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 11.5.0 through 11.5.9 allows remote authenticated users to crash the server via a crafted ALTER TABLE query. The ALTER TABLE processing path accepts an excessive size value for memory allocation; IBM has not disclosed the affected function or replication details. A valid database account is required, and the documented impact is a server crash without reported data disclosure or modification.

The record

CVE
CVE-2025-2668
Published
Jan 30, 2026
Updated
Jan 30, 2026
Vendor
IBM
Product
IBM Db2 for Linux, UNIX, and Windows
Classifications
CWE-770, CWE-789, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 30, 2026Record 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=11.5.0 <=11.5.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · IBM Db2 for Linux, UNIX, and Windowsversion=11.5.0 <=11.5.9

Published CVSS scores

6.5IBMCVSS: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.

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

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

CWE-770Allocation of Resources Without Limits or Throttling
CWE-789Memory Allocation with Excessive Size Value
T1499.004Application or System Exploitation

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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