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PatchSiren cyber security CVE debrief

CVE-2026-104332 IBM CVE debrief

IBM Db2 is vulnerable to a denial of service when executing a specially crafted query with a Materialized Query Table. This affects IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.5. The vulnerability can cause significant disruption to service operations, and defenders should prioritize verifying exposure and assessing potential impact on systems using these versions. The CVE record and source item provide details on the vulnerability and affected versions. Defenders should review and apply vendor-provided patches or updates to mitigate the vulnerability.

Vendor
IBM
Product
Db2
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-12
Original CVE updated
2026-10-12
Advisory published
2026-10-12
Advisory updated
2026-10-12

Who should care

Defenders responsible for systems using IBM Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5 should assess exposure and potential impact.

Why it matters

Defenders should prioritize verifying exposure and assessing potential impact on systems using IBM Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5 due to a denial of service vulnerability.

  • Potential denial of service attacks on systems using affected IBM Db2 versions.
  • Need to verify exposure and assess potential impact on systems using IBM Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5.
  • Priority on reviewing and applying vendor-provided patches or updates.

Technical summary

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.5 is vulnerable to a denial of service when executing a specially crafted query with a Materialized Query Table. The vulnerability is caused by improper handling of the query, which can lead to a denial of service. Defenders should prioritize verifying exposure and assessing potential impact on systems using IBM Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5. The CVE record and source item provide details on the vulnerability and affected versions.

Defensive priority

Defenders should prioritize verifying exposure and assessing potential impact on systems using IBM Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5.

Recommended defensive actions

  • Verify if systems using IBM Db2 are exposed to the affected versions.
  • Assess potential impact on systems using IBM Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5.
  • Review and apply vendor-provided patches or updates.
  • Monitor systems for potential denial of service attacks.

Evidence notes

The CVE record and source item provide details on the vulnerability, affected versions, and a reference to a vendor advisory. The vulnerability is caused by a specially crafted query with a Materialized Query Table, which can lead to a denial of service. The evidence is based on the CVE record and source item, which have not been modified since publication. The vendor advisory provides additional information on the vulnerability and patches or updates to mitigate it. Defenders should

Sources and references

Verified primary and authoritative sources

  • CVE-2026-104332 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-104332

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-104332 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-104332

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • IBM® Db2® Denial of Service

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/104xxx/CVE-2026-104332.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://www.ibm.com/support/pages/node/7291614

    Supplemental source - vendor-advisory, patch

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.