CVE intelligence

CVE-2026-68103

Vulnerability intelligence

Published Aug 10, 2026Sources checked Oct 28, 2026

7.1HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-68103 and is rated High severity with a CVSS score of 7.1. 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: Aug 14, 2026

CBL-Mariner Releases

Vendor-listed releases

6.6.150.1-1

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-2026-68103?

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: reject mapping a reserved doorbell to a new queue

When creating an user-queue, the user space provides a doorbell BO handle and an offset within the bo to obtain a doorbell.

However current implementation using xa_store_irq() to store a doorbell, which allows a later queue created with the same BO and offset parameters to overwrite an existing queue and doorbell mapping.

This can cause problems like misrouting fence IRQ processing to a wrong queue, and mislead the cleanup process of one queue erasing the mapping of another queue.

This commit fixes this issue by replacing xa_store_irq with xa_insert_irq, which rejects mapping a reserved doorbell to a newly created queue

(cherry picked from commit 6244eae22966350db52faf9c1369d3b2ffc5de4e)

Source: NVD