MediaTek DisplayPort Interface Driver Vulnerability in Linux Kernel

CVE-2023-53389

What is CVE-2023-53389?

A vulnerability exists in the MediaTek DisplayPort interface bridge driver within the Linux kernel, where it erroneously triggers High Pin Detection (HPD) events before confirming if the associated bridge is attached to a DRM device. This improper handling may lead to a kernel NULL pointer dereference, resulting in system instability or potential exploitation. The issue has been addressed by ensuring that HPD events are triggered only when the bridge is confirmed to be attached, enhancing the reliability and security of the driver.

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