Bug 2400808 (CVE-2023-53498)

Summary: CVE-2023-53498 kernel: drm/amd/display: Fix potential null dereference
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 2025-10-01 12:08:35 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: Fix potential null dereference

The adev->dm.dc pointer can be NULL and dereferenced in amdgpu_dm_fini()
without checking.

Add a NULL pointer check before calling dc_dmub_srv_destroy().

Found by Linux Verification Center (linuxtesting.org) with SVACE.
Comment 1 Jon Moroney 2025-10-01 18:20:36 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025100126-CVE-2023-53498-3f4e@gregkh/T