fkie_cve-2023-53389
Vulnerability from fkie_nvd
Published
2025-09-18 14:15
Modified
2025-09-19 16:00
Severity ?
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3551789d0635dfb2df8ab8e7fdbf0647e9c1724c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/36b617f7e4ae663fcadd202ea061ca695ca75539
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6524d3d58797975cc40b85be1e9b89721b4e8d0b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d1c04e338016ae2517c641806a831b1f3eee2bed
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/mediatek: dp: Only trigger DRM HPD events if bridge is attached\n\nThe MediaTek DisplayPort interface bridge driver starts its interrupts\nas soon as its probed. However when the interrupts trigger the bridge\nmight not have been attached to a DRM device. As drm_helper_hpd_irq_event()\ndoes not check whether the passed in drm_device is valid or not, a NULL\npointer passed in results in a kernel NULL pointer dereference in it.\n\nCheck whether the bridge is attached and only trigger an HPD event if\nit is."
    }
  ],
  "id": "CVE-2023-53389",
  "lastModified": "2025-09-19T16:00:27.847",
  "metrics": {},
  "published": "2025-09-18T14:15:42.003",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3551789d0635dfb2df8ab8e7fdbf0647e9c1724c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/36b617f7e4ae663fcadd202ea061ca695ca75539"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6524d3d58797975cc40b85be1e9b89721b4e8d0b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d1c04e338016ae2517c641806a831b1f3eee2bed"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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