Published Sep 24, 2026Sources checked Nov 12, 2026
8.8HIGHCVSS out of 10
What this means
Review the available evidence
CVE-2026-97509 and is rated High severity with a CVSS score of 8.8. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.
What to do next
Remediation and response
Microsoft Security Response Center guidance
Vendor revision: Sep 27, 2026
Release Notes
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-2026-97509?
In the Linux kernel, the following vulnerability has been resolved:
thunderbolt: Keep XDomain reference during the lifetime of a service
This is needed because we release the service ID in tb_service_release() and the ID array is owned by the parent XDomain.