IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, 11.1, and 11.5 could allow an unauthenticated attacker to cause a denial of service due a hang in the SSL handshake response. IBM X-Force ID: 193660.
CVSS v4.0 Metrics
Exploitability
Attack VectorNetwork
ComplexityLow
RequirementsPresent
PrivilegesNone
User InteractionNone
Threat
Exploit MaturityPoC
Vulnerable System
ConfidentialityNone
IntegrityNone
AvailabilityHigh
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Change Log
| Date | Source | Changes | Score |
|---|
| 2026-07-21 | PoC | E: U→P | 4.6 → 6.9 |
| 2026-07-21 | cve.org | initial, patch: Unavailable | 4.6 |
Affected Software
| Vendor | Product | Version |
|---|
| ibm | db2 | ≥ 11.5, ≤ 11.5.5.0 |
| ibm | db2 | ≥ 11.1.0.0, < 11.1.4.6 |
| ibm | db2 | 10.1 |
| ibm | db2 | 10.5 |
| ibm | db2 | 9.7 |
| IBM | DB2 for Linux, UNIX and Windows | 10.1 |
| IBM | DB2 for Linux, UNIX and Windows | 10.5 |
| IBM | DB2 for Linux, UNIX and Windows | 11.1 |
| IBM | DB2 for Linux, UNIX and Windows | 11.5 |
| IBM | DB2 for Linux, UNIX and Windows | 9.7 |
| netapp | oncommand_insight | All versions |
Published: 2021-03-11
