Bug 2356604 (CVE-2025-21941)

Summary: CVE-2025-21941 kernel: drm/amd/display: Fix null check for pipe_ctx->plane_state in resource_build_scaling_params
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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OS: Linux   
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Description OSIDB Bzimport 2025-04-01 16:02:05 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: Fix null check for pipe_ctx->plane_state in resource_build_scaling_params

Null pointer dereference issue could occur when pipe_ctx->plane_state
is null. The fix adds a check to ensure 'pipe_ctx->plane_state' is not
null before accessing. This prevents a null pointer dereference.

Found by code review.

(cherry picked from commit 63e6a77ccf239337baa9b1e7787cde9fa0462092)
Comment 1 Robb Gatica 2025-04-02 04:17:13 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025040135-CVE-2025-21941-8240@gregkh/T