CVE-2026-7771 IBM CVE debrief

Who should care

Users of IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 should be aware of this denial of service vulnerability. Operators and administrators of affected deployments should review the official advisory and apply patches or updates as recommended. Vulnerability management and security teams should also be aware of this vulnerability and review their environments for potential exposure. Additionally, platform owners and security teams should verify the affected products and versions in their environments and plan for remediation.

Technical summary

The vulnerability is caused by a trap in the database engine that can be triggered by maliciously crafted SQL statements containing subqueries. This trap can lead to a denial of service in IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4. The CVSS vector is CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H. The vulnerability has a CVSS score of 5.5 and a severity of MEDIUM. The affected products and versions are clearly identified, and defenders should focus on patching or mitigating the vulnerability in their environments.

Defensive priority

Medium priority should be given to patching this vulnerability as it could lead to a denial of service. Defenders should focus on verifying affected deployments, applying patches or updates, and monitoring for suspicious activity.

Recommended defensive actions

• Inventory and verify affected IBM Db2 versions
• Apply vendor patches or updates
• Monitor for suspicious activity
• Implement compensating controls
• Review and verify the integrity of database transactions

Evidence notes

The evidence for this vulnerability comes from the NVD and IBM PSIRT. The NVD provides a detailed description of the vulnerability, including its CVSS score and severity. IBM PSIRT has also provided information on the affected products and versions. However, the scope of affected deployments and potential impact on specific environments is not fully clear. Defenders should verify the affected products and versions in their environments and review the official advisory for further guidance. The evidence is limited to publicly available information, and additional details may be available through vendor channels.

Official resources