CVE-2026-86093: CWE-121 Stack-based Buffer Overflow in IBM Db2
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.
AI Analysis
Technical Summary
CVE-2026-86093 is a stack-based buffer overflow vulnerability (CWE-121) in IBM Db2 affecting versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5. The vulnerability arises from improper bounds checking when user-controlled data is copied into a fixed-size stack buffer, which can be exploited by an attacker able to control or impersonate a DRDA server endpoint. Successful exploitation could lead to arbitrary command execution on Db2 clients.
Potential Impact
An attacker with the ability to control or impersonate a DRDA server endpoint can exploit this vulnerability to execute arbitrary commands on affected Db2 clients. The CVSS 3.1 base score is 7.5, indicating high severity with high impact on confidentiality, integrity, and availability. This could lead to full compromise of the Db2 client environment.
Mitigation Recommendations
No patch or official fix information is provided in the available data. Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. Until a fix is available, restrict access to DRDA server endpoints to trusted entities only and monitor for suspicious activity related to Db2 client connections.
CVE-2026-86093: CWE-121 Stack-based Buffer Overflow in IBM Db2
Description
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.
CVSS v3.1
Score 7.5high
Affected software
IBM
Db2
cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:db2:11.5.9:*:*:*:*:*:*:*cpe:2.3:a:ibm:db2:12.1.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:db2:12.1.5:*:*:*:*:*:*:*Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-86093 is a stack-based buffer overflow vulnerability (CWE-121) in IBM Db2 affecting versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5. The vulnerability arises from improper bounds checking when user-controlled data is copied into a fixed-size stack buffer, which can be exploited by an attacker able to control or impersonate a DRDA server endpoint. Successful exploitation could lead to arbitrary command execution on Db2 clients.
Potential Impact
An attacker with the ability to control or impersonate a DRDA server endpoint can exploit this vulnerability to execute arbitrary commands on affected Db2 clients. The CVSS 3.1 base score is 7.5, indicating high severity with high impact on confidentiality, integrity, and availability. This could lead to full compromise of the Db2 client environment.
Mitigation Recommendations
No patch or official fix information is provided in the available data. Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. Until a fix is available, restrict access to DRDA server endpoints to trusted entities only and monitor for suspicious activity related to Db2 client connections.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-09-04T20:57:12.947Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa321e791cc7f3848c5a08f
Added to database: 09/10/2026, 21:32:23 UTC
Last enriched: 09/10/2026, 21:47:07 UTC
Last updated: 09/10/2026, 22:12:31 UTC
Views: 3
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