Denial of Service Vulnerability in IBM i by IBM
CVE-2026-16931

7.5HIGH

Key Information:

Vendor

IBM
Status
I
Vendor
CVE Published:
12 August 2026

What is CVE-2026-16931?

The IBM i platform versions 7.3 through 7.6 are susceptible to a denial of service attack that stems from the system's inadequate handling of zero-length TCP options. This weakness could be exploited by remote attackers, potentially leading to service disruptions and operational challenges for affected systems. IBM has issued advisory measures and patches to mitigate this vulnerability, underscoring the importance of prompt updates and system security vigilance.

Affected Version(s)

i 7.6

i 7.5

i 7.4

References

https://www.ibm.com/support/pages/node/7283288
vendor-advisorypatch

CVSS V3.1

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.