Buffer overflow in IBM Db2
CVE-2026-86093
IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.5 could allow an attacker with the ability to control or impersonate a DRDA server endpoint to execute arbitrary commands on Db2 clients due to a stack-based buffer overflow that improperly copies user-controlled data into a fixed-size stack buffer without bounds checking.
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
Weakness classification (CWE)
References
- psirt@us.ibm.com (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2026-86093?
- CVE-2026-86093 is a high-severity vulnerability in IBM Db2, classified under Stack-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-09-10.
- How severe is CVE-2026-86093?
- High severity. CVSS v3 base score is 7.5 out of 10.