CVE-2026-7771 - IBM® Db2® is vulnerable to a trap when compiling specially crafted statements containing subqueries could lead to a denial of service

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MEDIUM

IBM® Db2® is vulnerable to a trap when compiling specially crafted statements containing subqueries could lead to a denial of service

Published Jul 17, 2026

5.5

MEDIUM

CVSS 3.1

EPSS 0.15%

Description

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 is vulnerable to a trap when compiling a specially crafted statements containing subqueries could lead to a denial of service.

Affected products

Vendor IBM Product Db2 Default
unknown
Affected
- ≥ 11.5.0, ≤ 11.5.9
- ≥ 12.1.0, ≤ 12.1.4

Default status is the baseline for the product. Each version can override it (patched versions can be marked unaffected).

Vendor	Product	Default status	Versions
IBM	Db2	unknown	Affected ≥ 11.5.0, ≤ 11.5.9 ≥ 12.1.0, ≤ 12.1.4

Remediation

Vendor solution

Customers running any vulnerable modpack level of an affected Program,V11.5, and V12.1, can download the special build containing the interim fix for this issue from Fix Central. These special builds are available based on the most recent level for each impacted release: V11.5.9, and V12.1.4. They can be applied to any affected level of the appropriate release to remediate this vulnerability.

ReleaseFixed in mod packAPARDownload URL

V11.5

TBD

https://www.ibm.com/support/pages/node/7087189

V12.1

12.1.5

https://www.ibm.com/support/pages/node/7267513

IBM does not disclose key Db2 functionality nor replication steps for a vulnerability to avoid providing too much information to any potential malicious attacker. IBM does not want to enable a malicious attacker with sufficient knowledge to craft an exploit of the vulnerability.

Weaknesses (1)

CWE-835