Bug 2420408 (CVE-2025-40334)

Summary: CVE-2025-40334 kernel: drm/amdgpu: validate userq buffer virtual address and size
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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An input validation vulnerability was found in the AMD GPU driver in the Linux kernel. The user queue (userq) buffer virtual address and size are not properly validated to ensure they reside within a valid VM mapping. This could allow a local user to provide invalid addresses, potentially causing memory corruption or system crashes.
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Description OSIDB Bzimport 2025-12-09 05:01:24 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: validate userq buffer virtual address and size

It needs to validate the userq object virtual address to
determine whether it is residented in a valid vm mapping.
Comment 1 Alexander B 2025-12-09 14:39:35 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120910-CVE-2025-40334-82a0@gregkh/T