Buffer Overflow Vulnerability in IBM Db2 Database Software
CVE-2026-86093

7.5HIGH

Key Information:

Vendor

IBM
Status
Db2
Vendor
CVE Published:
10 September 2026

What is CVE-2026-86093?

A vulnerability exists in IBM Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5. This issue arises from improper bounds checking during the handling of user-controlled data copied into a fixed-size stack buffer. An attacker who can control or impersonate a DRDA server endpoint may exploit this flaw to execute arbitrary commands on the Db2 clients, potentially compromising their security and integrity.

Affected Version(s)

Db2 11.5.0 <= 11.5.9

Db2 12.1.0 <= 12.1.5

References

https://www.ibm.com/support/pages/node/7286993
vendor-advisorypatch

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This vulnerability was discovered by Niv Levy and Idan Bachar, Amazon.
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