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)
- Score
- CVSS 3.1 7.1 High
- Status
- Received - 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- Published
- 2026-08-10
- Last modified
- 2026-10-19
- Weaknesses
- CWE-662
Affected products
References
- https://git.kernel.org/stable/c/1050d258c7c56066d2dcaedf8d0ef66364062adc
- https://git.kernel.org/stable/c/a609b6278bf3cde17eeee6620091465521e4b02c
