CVE-2023-53389 - Vulnerability Details - OpenCVE

In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: dp: Only trigger DRM HPD events if bridge is attached The MediaTek DisplayPort interface bridge driver starts its interrupts as soon as its probed. However when the interrupts trigger the bridge might not have been attached to a DRM device. As drm_helper_hpd_irq_event() does not check whether the passed in drm_device is valid or not, a NULL pointer passed in results in a kernel NULL pointer dereference in it. Check whether the bridge is attached and only trigger an HPD event if it is.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

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References

Link	Providers
https://git.kernel.org/stable/c/3551789d0635dfb2df8ab8e7fdbf0647e9c1724c
https://git.kernel.org/stable/c/36b617f7e4ae663fcadd202ea061ca695ca75539
https://git.kernel.org/stable/c/6524d3d58797975cc40b85be1e9b89721b4e8d0b
https://git.kernel.org/stable/c/d1c04e338016ae2517c641806a831b1f3eee2bed

History

Thu, 18 Sep 2025 13:45:00 +0000

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: dp: Only trigger DRM HPD events if bridge is attached The MediaTek DisplayPort interface bridge driver starts its interrupts as soon as its probed. However when the interrupts trigger the bridge might not have been attached to a DRM device. As drm_helper_hpd_irq_event() does not check whether the passed in drm_device is valid or not, a NULL pointer passed in results in a kernel NULL pointer dereference in it. Check whether the bridge is attached and only trigger an HPD event if it is.
Title		drm/mediatek: dp: Only trigger DRM HPD events if bridge is attached
References		https://git.kernel.org/stable/c/3551789d0635dfb2df8ab8e7fdbf0647e9c1724c https://git.kernel.org/stable/c/36b617f7e4ae663fcadd202ea061ca695ca75539 https://git.kernel.org/stable/c/6524d3d58797975cc40b85be1e9b89721b4e8d0b https://git.kernel.org/stable/c/d1c04e338016ae2517c641806a831b1f3eee2bed

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-09-18T13:33:32.095Z

Updated: 2025-09-18T13:33:32.095Z

Reserved: 2025-09-17T14:54:09.737Z

Link: CVE-2023-53389

Vulnrichment

No data.

NVD

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Redhat

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