CVE intelligence
CVE-2026-89438
Vulnerability intelligence
Published Sep 11, 2026Sources checked Nov 3, 2026
N/ACVSS not listedScore unavailable
What this means
Review the available evidence
CVE-2026-89438. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.
CISA KEVNot listedBased on the latest collected catalog
EPSS0.2%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships
Overview
What is CVE-2026-89438?
In the Linux kernel, the following vulnerability has been resolved:
platform/x86: ISST: Validate logical CPU id and clos id
Validate max CLOS ID and logical CPU ID for core power feature. Reject any clos level or logical CPU number greater than the supported maximum.
These are used to calculate MMIO offset.
Source: NVD