Riskcovery

CVE-2026-68103

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

State
Published
Severity
7.1 High
Published
Aug 10, 2026
Updated
Oct 19, 2026
Reserved
Jul 30, 2026

Read the record on cve.org

Description

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)

Scores

CVSSScoreVectorSource
3.17.1 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:HLinux

Weaknesses

Affected Products

ProductVersions
LinuxLinux
  • 8949843762631d9d0fc526dfb61a272dca29fc6f to before 1050d258c7c56066d2dcaedf8d0ef66364062adcAffected
  • 8949843762631d9d0fc526dfb61a272dca29fc6f to before a609b6278bf3cde17eeee6620091465521e4b02cAffected
LinuxLinux
  • 6.16Affected
  • before 6.16Not affected
  • 7.1.6 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

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