IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, 11.1…
Priority LOW 28Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, 11.1, and 11.5 is vulnerable to a denial of service, caused by improper handling of Secure Sockets Layer (SSL) renegotiation requests. By sending specially-crafted requests, a remote attacker could exploit this vulnerability to increase the resource usage on the system. IBM X-Force ID: 178507.
Why it matters now
EPSS 0.02161 82nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| IBM | DB2 for Linux- UNIX and Windows | 9.7; 10.1; 10.5; 11.1; 11.5 | — | No fix listed | CNA |
- DB2 for Linux- UNIX and Windows VendorIBM Affected 9.7; 10.1; 10.5; 11.1; 11.5 Fixed in — No fix listed CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:ibm:db2:9.7.0.0:*:*:*:*:*:*:* | 9.7.0.0 | Vulnerable | IBM |
| cpe:2.3:a:ibm:db2:10.1.0.0:*:*:*:*:*:*:* | 10.1.0.0 | Vulnerable | IBM |
| cpe:2.3:a:ibm:db2:10.5.0.0:*:*:*:*:*:*:* | 10.5.0.0 | Vulnerable | IBM |
| cpe:2.3:a:ibm:db2:11.1.0.0:*:*:*:*:*:*:* | 11.1.0.0 | Vulnerable | IBM |
| cpe:2.3:a:ibm:db2:11.5.0.0:*:*:*:*:*:*:* | 11.5.0.0 | Vulnerable | IBM |
| cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Linux |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
- cpe:2.3:a:ibm:db2:9.7.0.0:*:*:*:*:*:*:* Versions 9.7.0.0 Vulnerable ·IBM
- cpe:2.3:a:ibm:db2:10.1.0.0:*:*:*:*:*:*:* Versions 10.1.0.0 Vulnerable ·IBM
- cpe:2.3:a:ibm:db2:10.5.0.0:*:*:*:*:*:*:* Versions 10.5.0.0 Vulnerable ·IBM
- cpe:2.3:a:ibm:db2:11.1.0.0:*:*:*:*:*:*:* Versions 11.1.0.0 Vulnerable ·IBM
- cpe:2.3:a:ibm:db2:11.5.0.0:*:*:*:*:*:*:* Versions 11.5.0.0 Vulnerable ·IBM
- cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Linux
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-4355
- 2026-10-03 Alias added: GHSA-6qmh-qf4p-53f5
References
More IBM Db2 vulnerabilities
- TI-2007-02494 Multiple buffer overflows in the DB2 JDBC Applet Server (DB2JDS) service in IBM DB2 9.x… CVSS 2.0HIGH 10.0
- TI-2010-03546 Stack-based buffer overflow in the validateUser implementation in the… CVSS 2.0HIGH 10.0
- TI-2026-08862 IBM® Db2® is vulnerable to remote code execution due to improper pre-auth DRDA handshake handling CVSS 3.1CRITICAL 9.8
- TI-2007-03566 IBM DB2 Universal Database (UDB) Administration Server (DAS) 8 before Fix Pack 16 and 9… CVSS 2.0HIGH 10.0
- TI-2008-06509 Buffer overflow in the DAS server in IBM DB2 8 before FP17, 9.1 before FP5, and 9.5… CVSS 2.0HIGH 10.0
- TI-2026-09068 IBM® Db2® is vulnerable to privilege escalation with a specially crafted query CVSS 3.1CRITICAL 9.8
Sources
- CVE-2020-4355 · CVE Program
- CVE-2020-4355 · NVD
- FIRST EPSS
- GHSA-6qmh-qf4p-53f5 · GitHub Advisory Database · CC BY 4.0
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