Denial of Service Vulnerability in IBM i Systems
CVE-2026-17255

4.3MEDIUM

Key Information:

Vendor

IBM
Status
I
Vendor
CVE Published:
4 September 2026

What is CVE-2026-17255?

A vulnerability exists in IBM i systems wherein improper validation of prefix length in ICMPv6 Router Advertisements may enable a remote attacker to disrupt services, potentially leading to application unavailability. Administrators should implement the recommended patches to mitigate this risk and ensure the integrity and availability of their systems.

Affected Version(s)

i 7.6

i 7.5

i 7.4

References

https://www.ibm.com/support/pages/node/7286093
vendor-advisorypatch

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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