Bug 2486470 (CVE-2026-46311) - CVE-2026-46311 kernel: drm/amdgpu/userq: fix access to stale wptr mapping
Summary: CVE-2026-46311 kernel: drm/amdgpu/userq: fix access to stale wptr mapping
Keywords:
Status: NEW
Alias: CVE-2026-46311
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-08 17:03 UTC by OSIDB Bzimport
Modified: 2026-09-25 06:12 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:71602 0 None None None 2026-09-24 15:05:11 UTC
Red Hat Product Errata RHSA-2026:71700 0 None None None 2026-09-25 06:12:54 UTC

Description OSIDB Bzimport 2026-06-08 17:03:42 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu/userq: fix access to stale wptr mapping

Use drm_exec to take both locks i.e vm root bo and
wptr_obj bo to access the mapping data properly.

This fixes the security issue of unmap the wptr_obj while
a queue creation is in progress and passing other
bo at same address.

(cherry picked from commit 1fc6c8ab45dbee096469c08c13f6099d57a52d6c)
Comment 1 Keith Grant 2026-06-08 18:19:14 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026060853-CVE-2026-46311-bf08@gregkh/T
Comment 3 Jon Orris 2026-09-24 15:05:10 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:71602 https://access.redhat.com/errata/RHSA-2026:71602
Comment 4 Jon Orris 2026-09-25 06:12:53 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:71700 https://access.redhat.com/errata/RHSA-2026:71700
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