Bug 2396415 (CVE-2023-53388)

Summary: CVE-2023-53388 kernel: drm/mediatek: Clean dangling pointer on bind error path
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 2025-09-18 14:03:43 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/mediatek: Clean dangling pointer on bind error path

mtk_drm_bind() can fail, in which case drm_dev_put() is called,
destroying the drm_device object. However a pointer to it was still
being held in the private object, and that pointer would be passed along
to DRM in mtk_drm_sys_prepare() if a suspend were triggered at that
point, resulting in a panic. Clean the pointer when destroying the
object in the error path to prevent this from happening.
Comment 1 Keith Grant 2025-09-18 17:00:32 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091858-CVE-2023-53388-657a@gregkh/T