Riskcovery

CVE-2023-53389

drm/mediatek: dp: Only trigger DRM HPD events if bridge is attached

State
Published
Severity
5.5 Medium
Published
Sep 18, 2025
Updated
May 11, 2026
Reserved
Sep 17, 2025

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.15.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HCISA-ADP

Weaknesses

Affected Products

ProductVersions
LinuxLinux
  • f70ac097a2cf5d4b67b2c1bbb73196c573ffcb7b to before 6524d3d58797975cc40b85be1e9b89721b4e8d0bAffected
  • f70ac097a2cf5d4b67b2c1bbb73196c573ffcb7b to before 3551789d0635dfb2df8ab8e7fdbf0647e9c1724cAffected
  • f70ac097a2cf5d4b67b2c1bbb73196c573ffcb7b to before d1c04e338016ae2517c641806a831b1f3eee2bedAffected
  • f70ac097a2cf5d4b67b2c1bbb73196c573ffcb7b to before 36b617f7e4ae663fcadd202ea061ca695ca75539Affected
LinuxLinux
  • 6.1Affected
  • before 6.1Not affected
  • 6.1.28 through 6.1.*Not affected
  • 6.2.15 through 6.2.*Not affected
  • 6.3.2 through 6.3.*Not affected
  • 6.4 and laterNot affected

References

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