fkie_cve-2022-48735
Vulnerability from fkie_nvd
Published
2024-06-20 12:15
Modified
2025-05-23 20:48
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: hda: Fix UAF of leds class devs at unbinding The LED class devices that are created by HD-audio codec drivers are registered via devm_led_classdev_register() and associated with the HD-audio codec device. Unfortunately, it turned out that the devres release doesn't work for this case; namely, since the codec resource release happens before the devm call chain, it triggers a NULL dereference or a UAF for a stale set_brightness_delay callback. For fixing the bug, this patch changes the LED class device register and unregister in a manual manner without devres, keeping the instances in hda_gen_spec.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0e629052f013eeb61494d4df2f1f647c2a9aef47Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/549f8ffc7b2f7561bea7f90930b6c5104318e87bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/813e9f3e06d22e29872d4fd51b54992d89cf66c8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a7de1002135cf94367748ffc695a29812d7633b5Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0e629052f013eeb61494d4df2f1f647c2a9aef47Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/549f8ffc7b2f7561bea7f90930b6c5104318e87bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/813e9f3e06d22e29872d4fd51b54992d89cf66c8Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a7de1002135cf94367748ffc695a29812d7633b5Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.17
linux linux_kernel 5.17


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: hda: Fix UAF of leds class devs at unbinding\n\nThe LED class devices that are created by HD-audio codec drivers are\nregistered via devm_led_classdev_register() and associated with the\nHD-audio codec device.  Unfortunately, it turned out that the devres\nrelease doesn\u0027t work for this case; namely, since the codec resource\nrelease happens before the devm call chain, it triggers a NULL\ndereference or a UAF for a stale set_brightness_delay callback.\n\nFor fixing the bug, this patch changes the LED class device register\nand unregister in a manual manner without devres, keeping the\ninstances in hda_gen_spec."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: ALSA: hda: corrige UAF de los desarrolladores de clase LED al desvincularse. Los dispositivos de clase LED creados por controladores de c\u00f3dec de audio HD se registran a trav\u00e9s de devm_led_classdev_register() y se asocian con el audio HD. dispositivo c\u00f3dec. Desafortunadamente, result\u00f3 que la versi\u00f3n devres no funciona para este caso; es decir, dado que la liberaci\u00f3n del recurso del c\u00f3dec ocurre antes de la cadena de llamadas del desarrollador, desencadena una desreferencia NULL o un UAF para una devoluci\u00f3n de llamada obsoleta set_brightness_delay. Para corregir el error, este parche cambia el registro y cancelaci\u00f3n del registro del dispositivo de clase LED de forma manual sin devres, manteniendo las instancias en hda_gen_spec."
    }
  ],
  "id": "CVE-2022-48735",
  "lastModified": "2025-05-23T20:48:34.803",
  "metrics": {
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
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        "impactScore": 5.9,
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  "published": "2024-06-20T12:15:11.890",
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  "vulnStatus": "Analyzed",
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          "value": "CWE-416"
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          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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  ]
}


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