CVE-2024-56532

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2024-56532
In the Linux kernel, the following vulnerability has been resolved: ALSA: us122l: Use snd_card_free_when_closed() at disconnection The USB disconnect callback is supposed to be short and not too-long waiting. OTOH, the current code uses snd_card_free() at disconnection, but this waits for the close of all used fds, hence it can take long. It eventually blocks the upper layer USB ioctls, which may trigger a soft lockup. An easy workaround is to replace snd_card_free() with snd_card_free_when_closed(). This variant returns immediately while the release of resources is done asynchronously by the card device release at the last close. The loop of us122l->mmap_count check is dropped as well. The check is useless for the asynchronous operation with *_when_closed().

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/020cbc4d7414f0962004213e2b7bc5cc607e9ec7 Patch
https://git.kernel.org/stable/c/2938dd2648522336133c151dd67bb9bf01cbd390 Patch
https://git.kernel.org/stable/c/75f418b249d84021865eaa59515d3ed9b75ce4d6 Patch
https://git.kernel.org/stable/c/9a48bd2184b142c92a4e17eac074c61fcf975bc9 Patch
https://git.kernel.org/stable/c/9b27924dc8d7f8a8c35e521287d4ccb9a006e597 Patch
https://git.kernel.org/stable/c/9d5c530e4d70f64b1114f2cc29ac690ba7ac4a38 Patch
https://git.kernel.org/stable/c/b7df09bb348016943f56b09dcaafe221e3f73947 Patch
https://git.kernel.org/stable/c/bc778ad3e495333eebda36fe91d5b2c93109cc16 Patch
https://git.kernel.org/stable/c/bf0aa35a7cb8602cccf2387712114e836f65c154 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:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

19 Sep 2025, 16:18

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: us122l: Usar snd_card_free_when_closed() en la desconexión Se supone que la devolución de llamada de desconexión USB es corta y no requiere una espera demasiado larga. Por otro lado, el código actual usa snd_card_free() en la desconexión, pero esto espera el cierre de todos los fds usados, por lo tanto, puede tomar mucho tiempo. Eventualmente bloquea los ioctl USB de la capa superior, lo que puede desencadenar un bloqueo suave. Una solución fácil es reemplazar snd_card_free() con snd_card_free_when_closed(). Esta variante regresa inmediatamente mientras que la liberación de recursos se realiza de forma asincrónica por la liberación del dispositivo de la tarjeta en el último cierre. El bucle de comprobación us122l->mmap_count también se elimina. La comprobación es inútil para la operación asincrónica con *_when_closed().
First Time Linux linux Kernel
Linux
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
References () https://git.kernel.org/stable/c/020cbc4d7414f0962004213e2b7bc5cc607e9ec7 - () https://git.kernel.org/stable/c/020cbc4d7414f0962004213e2b7bc5cc607e9ec7 - Patch
References () https://git.kernel.org/stable/c/2938dd2648522336133c151dd67bb9bf01cbd390 - () https://git.kernel.org/stable/c/2938dd2648522336133c151dd67bb9bf01cbd390 - Patch
References () https://git.kernel.org/stable/c/75f418b249d84021865eaa59515d3ed9b75ce4d6 - () https://git.kernel.org/stable/c/75f418b249d84021865eaa59515d3ed9b75ce4d6 - Patch
References () https://git.kernel.org/stable/c/9a48bd2184b142c92a4e17eac074c61fcf975bc9 - () https://git.kernel.org/stable/c/9a48bd2184b142c92a4e17eac074c61fcf975bc9 - Patch
References () https://git.kernel.org/stable/c/9b27924dc8d7f8a8c35e521287d4ccb9a006e597 - () https://git.kernel.org/stable/c/9b27924dc8d7f8a8c35e521287d4ccb9a006e597 - Patch
References () https://git.kernel.org/stable/c/9d5c530e4d70f64b1114f2cc29ac690ba7ac4a38 - () https://git.kernel.org/stable/c/9d5c530e4d70f64b1114f2cc29ac690ba7ac4a38 - Patch
References () https://git.kernel.org/stable/c/b7df09bb348016943f56b09dcaafe221e3f73947 - () https://git.kernel.org/stable/c/b7df09bb348016943f56b09dcaafe221e3f73947 - Patch
References () https://git.kernel.org/stable/c/bc778ad3e495333eebda36fe91d5b2c93109cc16 - () https://git.kernel.org/stable/c/bc778ad3e495333eebda36fe91d5b2c93109cc16 - Patch
References () https://git.kernel.org/stable/c/bf0aa35a7cb8602cccf2387712114e836f65c154 - () https://git.kernel.org/stable/c/bf0aa35a7cb8602cccf2387712114e836f65c154 - Patch
CWE CWE-667

27 Dec 2024, 14:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-12-27 14:15

Updated : 2025-10-01 20:17

NVD link : CVE-2024-56532

Mitre link : CVE-2024-56532

CVE.ORG link : CVE-2024-56532

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-667

Improper Locking