Bug 2356918 (CVE-2025-21990)

Summary: CVE-2025-21990 kernel: drm/amdgpu: NULL-check BO's backing store when determining GFX12 PTE flags
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: low    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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OS: Linux   
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Description OSIDB Bzimport 2025-04-02 14:02:39 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: NULL-check BO's backing store when determining GFX12 PTE flags

PRT BOs may not have any backing store, so bo->tbo.resource will be
NULL. Check for that before dereferencing.

(cherry picked from commit 3e3fcd29b505cebed659311337ea03b7698767fc)
Comment 1 Michal Findra 2025-04-02 14:44:40 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025040256-CVE-2025-21990-cc2d@gregkh/T