CVE-2023-53389

low-risk
Published 2025-09-18

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.

Do I need to act?

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0.01% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Linux

References (4)

Patch https://git.kernel.org/stable/c/3551789d0635dfb2df8ab8e7fdbf0647e9c1724c
Patch https://git.kernel.org/stable/c/36b617f7e4ae663fcadd202ea061ca695ca75539
Patch https://git.kernel.org/stable/c/6524d3d58797975cc40b85be1e9b89721b4e8d0b
Patch https://git.kernel.org/stable/c/d1c04e338016ae2517c641806a831b1f3eee2bed
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal