CVE-2026-10109: IBM® Db2® is vulnerable to remote code execution due to improper pre-auth DRDA handshake handling

Published Jun 23, 2026
·
Updated

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 is vulnerable to remote code execution due to improper pre-auth DRDA handshake handling.

Other sources

IBM Db2 is vulnerable to remote code execution due to improper pre-auth DRDA handshake handling.

— IBM

Affected Software

5 affected components
IBM DB2>=11.5.0<=11.5.9, >=12.1.0<=12.1.4
IBM IBM® Db2®<=11.5.0 - 11.5.9
IBM IBM® Db2®<=12.1.0 - 12.1.4
IBM DB2>=11.5.0<=11.5.9
IBM DB2>=12.1.0<=12.1.4

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade IBM Db2 to a version that resolves this vulnerability.

    Fixed in 11.5.9Patch mod packAPAR
  2. Upgrade

    Upgrade IBM Db2 to a version that resolves this vulnerability.

    Fixed in 12.1.4Patch mod packAPAR

Event History

Jun 30, 2026
CVE Published
via MITRE·08:02 PM
Data Sourced
via MITRE·08:02 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·08:17 PM
DescriptionSeverityWeaknessAffected Software
Jul 6, 2026
Data Sourced
via IBM·08:22 PM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the severity of CVE-2026-10109?

The severity of CVE-2026-10109 is critical with a CVSS score of 9.8.

2

How do I fix CVE-2026-10109?

To fix CVE-2026-10109, update IBM Db2 to version 11.5.10 or later, or 12.1.5 or later.

3

What types of attacks are possible with CVE-2026-10109?

CVE-2026-10109 allows attackers to execute remote code on affected systems due to improper pre-auth DRDA handshake handling.

4

Which versions of IBM Db2 are affected by CVE-2026-10109?

IBM Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.4 are affected by CVE-2026-10109.

5

What is the nature of the vulnerability in CVE-2026-10109?

CVE-2026-10109 is a code injection vulnerability that enables remote code execution due to improper DRDA handshake handling.

Company

Resources

Contact

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