CVE-2025-36423

Server crash via crafted federated statement

Published Jan 30, 2026 · Updated Jan 30, 2026

Denial of service in IBM Db2 Federated server 12.1.0 through 12.1.3 allows local users to crash the server via a crafted statement. The Federated server mishandles a specified quantity in data query logic while processing the statement; IBM has not disclosed the affected code path or precise validation failure. Only Unix deployments are affected; Linux and Windows are not, and a local Db2 user must be able to submit the statement.

CVSS severity6.5
Medium
EPSS probability0.25%
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 Federated server 12.1.0 through 12.1.3 allows local users to crash the server via a crafted statement. The Federated server mishandles a specified quantity in data query logic while processing the statement; IBM has not disclosed the affected code path or precise validation failure. Only Unix deployments are affected; Linux and Windows are not, and a local Db2 user must be able to submit the statement.

The record

CVE
CVE-2025-36423
Published
Jan 30, 2026
Updated
Jan 30, 2026
Vendor
IBM
Product
IBM Db2 for Linux, UNIX, and Windows
Classifications
CWE-1284, T1499.004
Attack vector
local
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=12.1.0 <=12.1.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

IBM · IBM Db2 for Linux, UNIX, and Windowsversion=12.1.0 <=12.1.3

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1284Improper Validation of Specified Quantity in Input
T1499.004Endpoint Denial of Service: Application 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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