CVE-2022-49291

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-49291
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.

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/0090c13cbbdffd7da079ac56f80373a9a1be0bf8 Patch
https://git.kernel.org/stable/c/0f6947f5f5208f6ebd4d76a82a4757e2839a23f8 Patch
https://git.kernel.org/stable/c/1bbf82d9f961414d6c76a08f7f843ea068e0ab7b Patch
https://git.kernel.org/stable/c/33061d0fba51d2bf70a2ef9645f703c33fe8e438 Patch
https://git.kernel.org/stable/c/92ee3c60ec9fe64404dc035e7c41277d74aa26cb Patch
https://git.kernel.org/stable/c/9cb6c40a6ebe4a0cfc9d6a181958211682cffea9 Patch
https://git.kernel.org/stable/c/a42aa926843acca96c0dfbde2e835b8137f2f092 Patch
https://git.kernel.org/stable/c/fbeb492694ce0441053de57699e1e2b7bc148a69 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

25 Mar 2025, 14:49

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Summary
  • (es) 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 comprobación adecuada ni la protección 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->buffer_mutex, y lo aplica a las rutas de código de ioctl hw_params y hw_free. Junto con él, ambas funciones se modifican ligeramente (la comprobación mmap_count se mueve al bloque state-check) para simplificar el código.
First Time Linux
Linux linux Kernel
References () https://git.kernel.org/stable/c/0090c13cbbdffd7da079ac56f80373a9a1be0bf8 - () https://git.kernel.org/stable/c/0090c13cbbdffd7da079ac56f80373a9a1be0bf8 - Patch
References () https://git.kernel.org/stable/c/0f6947f5f5208f6ebd4d76a82a4757e2839a23f8 - () https://git.kernel.org/stable/c/0f6947f5f5208f6ebd4d76a82a4757e2839a23f8 - Patch
References () https://git.kernel.org/stable/c/1bbf82d9f961414d6c76a08f7f843ea068e0ab7b - () https://git.kernel.org/stable/c/1bbf82d9f961414d6c76a08f7f843ea068e0ab7b - Patch
References () https://git.kernel.org/stable/c/33061d0fba51d2bf70a2ef9645f703c33fe8e438 - () https://git.kernel.org/stable/c/33061d0fba51d2bf70a2ef9645f703c33fe8e438 - Patch
References () https://git.kernel.org/stable/c/92ee3c60ec9fe64404dc035e7c41277d74aa26cb - () https://git.kernel.org/stable/c/92ee3c60ec9fe64404dc035e7c41277d74aa26cb - Patch
References () https://git.kernel.org/stable/c/9cb6c40a6ebe4a0cfc9d6a181958211682cffea9 - () https://git.kernel.org/stable/c/9cb6c40a6ebe4a0cfc9d6a181958211682cffea9 - Patch
References () https://git.kernel.org/stable/c/a42aa926843acca96c0dfbde2e835b8137f2f092 - () https://git.kernel.org/stable/c/a42aa926843acca96c0dfbde2e835b8137f2f092 - Patch
References () https://git.kernel.org/stable/c/fbeb492694ce0441053de57699e1e2b7bc148a69 - () https://git.kernel.org/stable/c/fbeb492694ce0441053de57699e1e2b7bc148a69 - Patch

27 Feb 2025, 18:15

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
CWE CWE-416

26 Feb 2025, 07:01

Type Values Removed Values Added
New CVE
Information

Published : 2025-02-26 07:01

Updated : 2025-03-25 14:49

NVD link : CVE-2022-49291

Mitre link : CVE-2022-49291

CVE.ORG link : CVE-2022-49291

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-416

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