Dangling Pointer Vulnerability in Linux Kernel's MediaTek DRM Component

CVE-2023-53388

What is CVE-2023-53388?

A vulnerability has been identified in the MediaTek DRM component of the Linux kernel, where a dangling pointer is held in the private object after a failure in the mtk_drm_bind() function. This situation arises if drm_dev_put() is called to destroy the drm_device object without cleaning the pointer. If a suspend event is triggered during this state, it leads to a system panic as the invalid pointer is referenced in mtk_drm_sys_prepare(). To prevent this, proper management of the pointer during error handling is essential.

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