Bug 2536234 (CVE-2026-93139) - CVE-2026-93139 kernel: drm/amdgpu/mes: Fix hung_queue_db_array loop limit for multi-XCC
Summary: CVE-2026-93139 kernel: drm/amdgpu/mes: Fix hung_queue_db_array loop limit for...
Keywords:
Status: NEW
Alias: CVE-2026-93139
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: 2026-09-17 17:02 UTC by OSIDB Bzimport
Modified: 2026-10-20 11:42 UTC (History)
17 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-09-17 17:02:07 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu/mes: Fix hung_queue_db_array loop limit for multi-XCC

The loop iterated only AMDGPU_MAX_MES_PIPES times, leaving entries
uninitialized for multi-XCC GPUs. This causes null pointer dereferences
when accessing arrays indexed by XCC ID >= 2. Extend the loop to cover
all XCCs (AMDGPU_MAX_MES_PIPES * num_xcc), matching other per-XCC
arrays.
Comment 1 gkamathe 2026-09-18 19:06:13 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93139.mbox
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