Bug 2393485 (CVE-2025-39707)

Summary: CVE-2025-39707 kernel: drm/amdgpu: check if hubbub is NULL in debugfs/amdgpu_dm_capabilities
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-09-05 18:01:34 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: check if hubbub is NULL in debugfs/amdgpu_dm_capabilities

HUBBUB structure is not initialized on DCE hardware, so check if it is NULL
to avoid null dereference while accessing amdgpu_dm_capabilities file in
debugfs.
Comment 1 Jon Moroney 2025-09-05 22:19:32 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025090549-CVE-2025-39707-c905@gregkh/T