CVE-2023-53389
drm/mediatek: dp: Only trigger DRM HPD events if bridge is attached
CVSS Score
5.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 18, 2025 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
f70ac097a2cf5d4b67b2c1bbb73196c573ffcb7b < 6524d3d58797975cc40b85be1e9b89721b4e8d0b f70ac097a2cf5d4b67b2c1bbb73196c573ffcb7b < 3551789d0635dfb2df8ab8e7fdbf0647e9c1724c f70ac097a2cf5d4b67b2c1bbb73196c573ffcb7b < d1c04e338016ae2517c641806a831b1f3eee2bed f70ac097a2cf5d4b67b2c1bbb73196c573ffcb7b < 36b617f7e4ae663fcadd202ea061ca695ca75539
Linux / Linux
6.1
References
git.kernel.org: https://git.kernel.org/stable/c/6524d3d58797975cc40b85be1e9b89721b4e8d0b git.kernel.org: https://git.kernel.org/stable/c/3551789d0635dfb2df8ab8e7fdbf0647e9c1724c git.kernel.org: https://git.kernel.org/stable/c/d1c04e338016ae2517c641806a831b1f3eee2bed git.kernel.org: https://git.kernel.org/stable/c/36b617f7e4ae663fcadd202ea061ca695ca75539