FKIE_CVE-2022-49291

Vulnerability from fkie_nvd - Published: 2025-02-26 07:01 - Updated: 2025-03-25 14:49
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: pcm: Fix races among concurrent hw_params and hw_free calls Currently we have neither proper check nor protection against the concurrent calls of PCM hw_params and hw_free ioctls, which may result in a UAF. Since the existing PCM stream lock can't be used for protecting the whole ioctl operations, we need a new mutex to protect those racy calls. This patch introduced a new mutex, runtime->buffer_mutex, and applies it to both hw_params and hw_free ioctl code paths. Along with it, the both functions are slightly modified (the mmap_count check is moved into the state-check block) for code simplicity.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0090c13cbbdffd7da079ac56f80373a9a1be0bf8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0f6947f5f5208f6ebd4d76a82a4757e2839a23f8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1bbf82d9f961414d6c76a08f7f843ea068e0ab7bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/33061d0fba51d2bf70a2ef9645f703c33fe8e438Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/92ee3c60ec9fe64404dc035e7c41277d74aa26cbPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9cb6c40a6ebe4a0cfc9d6a181958211682cffea9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a42aa926843acca96c0dfbde2e835b8137f2f092Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fbeb492694ce0441053de57699e1e2b7bc148a69Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ALSA: pcm: Arregla ejecuciones entre llamadas hw_params y hw_free concurrentes Actualmente no tenemos ni la comprobaci\u00f3n adecuada ni la protecci\u00f3n contra las llamadas concurrentes de las ioctl hw_params y hw_free de PCM, lo que puede resultar en un UAF. Dado que el bloqueo de flujo de PCM existente no se puede utilizar para proteger todas las operaciones ioctl, necesitamos un nuevo mutex para proteger esas llamadas con ejecuciones. Este parche introdujo un nuevo mutex, runtime-\u0026gt;buffer_mutex, y lo aplica a las rutas de c\u00f3digo de ioctl hw_params y hw_free. Junto con \u00e9l, ambas funciones se modifican ligeramente (la comprobaci\u00f3n mmap_count se mueve al bloque state-check) para simplificar el c\u00f3digo."
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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