CVE-2026-68103

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-68103

Key Details

CVE	CVE-2026-68103
CVSS Score / Version	7.1 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is none; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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) (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-68103
CVE	https://www.cve.org/CVERecord?id=CVE-2026-68103

Source

Reference

NVD

CVE