{
  "id": "CVE-2024-46698",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-09-13T06:15:14.563",
  "lastModified": "2024-09-13T16:53:03.000",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvideo/aperture: optionally match the device in sysfb_disable()\n\nIn aperture_remove_conflicting_pci_devices(), we currently only\ncall sysfb_disable() on vga class devices.  This leads to the\nfollowing problem when the pimary device is not VGA compatible:\n\n1. A PCI device with a non-VGA class is the boot display\n2. That device is probed first and it is not a VGA device so\n   sysfb_disable() is not called, but the device resources\n   are freed by aperture_detach_platform_device()\n3. Non-primary GPU has a VGA class and it ends up calling sysfb_disable()\n4. NULL pointer dereference via sysfb_disable() since the resources\n   have already been freed by aperture_detach_platform_device() when\n   it was called by the other device.\n\nFix this by passing a device pointer to sysfb_disable() and checking\nthe device to determine if we should execute it or not.\n\nv2: Fix build when CONFIG_SCREEN_INFO is not set\nv3: Move device check into the mutex\n    Drop primary variable in aperture_remove_conflicting_pci_devices()\n    Drop __init on pci sysfb_pci_dev_is_enabled()"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: video/aperture: opcionalmente hacer coincidir el dispositivo en sysfb_disable() En aperture_remove_conflicting_pci_devices(), actualmente solo llamamos a sysfb_disable() en dispositivos de clase vga. Esto lleva al siguiente problema cuando el dispositivo principal no es compatible con VGA: 1. Un dispositivo PCI con una clase que no es VGA es la pantalla de arranque 2. Ese dispositivo se sondea primero y no es un dispositivo VGA, por lo que no se llama a sysfb_disable(), pero los recursos del dispositivo se liberan mediante aperture_detach_platform_device() 3. La GPU no principal tiene una clase VGA y termina llamando a sysfb_disable() 4. Desreferencia de puntero NULL a trav\u00e9s de sysfb_disable() ya que los recursos ya se han liberado mediante aperture_detach_platform_device() cuando fue llamado por el otro dispositivo. Solucione esto pasando un puntero de dispositivo a sysfb_disable() y verificando el dispositivo para determinar si debemos ejecutarlo o no. v2: Arreglar la compilaci\u00f3n cuando CONFIG_SCREEN_INFO no est\u00e1 configurado v3: Mover la verificaci\u00f3n del dispositivo al mutex Eliminar la variable principal en aperture_remove_conflicting_pci_devices() Eliminar __init en pci sysfb_pci_dev_is_enabled()"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
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  "references": [
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      "url": "https://git.kernel.org/stable/c/17e78f43de0c6da34204cc858b4cc05671ea9acf",
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