CVE-2024-56531

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  2. Vulnerabilities (CVE)
  3. CVE-2024-56531

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

I

n the Linux kernel, the following vulnerability has been resolved: ALSA: caiaq: 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. This patch also splits the code to the disconnect and the free phases; the former is called immediately at the USB disconnect callback while the latter is called from the card destructor.

References
Link Resource
https://git.kernel.org/stable/c/237f3faf0177bdde728fa3106d730d806436aa4d Patch
https://git.kernel.org/stable/c/3993edf44d3df7b6e8c753eac6ac8783473fcbab Patch
https://git.kernel.org/stable/c/4507a8b9b30344c5ddd8219945f446d47e966a6d Patch
https://git.kernel.org/stable/c/4dd821dcbfcecf7af6a08370b0b217cde2818acf Patch
https://git.kernel.org/stable/c/a3f9314752dbb6f6aa1f0f2b4c58243bda800738 Patch
https://git.kernel.org/stable/c/b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c Patch
https://git.kernel.org/stable/c/cadf1d8e9ddcd74584ec961aeac14ac549b261d8 Patch
https://git.kernel.org/stable/c/dd0de8cb708951cebf727aa045e8242ba651bb52 Patch
https://git.kernel.org/stable/c/ebad462eec93b0f701dfe4de98990e7355283801 Patch
https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
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

03 Nov 2025, 21:17

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html -
  • () https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html -

01 Oct 2025, 20:17

Type Values Removed Values Added
First Time Linux
Linux linux Kernel
CWE CWE-667
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ALSA: caiaq: 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. Este parche también divide el código en las fases de desconexión y liberación; la primera se llama inmediatamente en la devolución de llamada de desconexión USB mientras que la segunda se llama desde el destructor de la tarjeta.
References () https://git.kernel.org/stable/c/237f3faf0177bdde728fa3106d730d806436aa4d - () https://git.kernel.org/stable/c/237f3faf0177bdde728fa3106d730d806436aa4d - Patch
References () https://git.kernel.org/stable/c/3993edf44d3df7b6e8c753eac6ac8783473fcbab - () https://git.kernel.org/stable/c/3993edf44d3df7b6e8c753eac6ac8783473fcbab - Patch
References () https://git.kernel.org/stable/c/4507a8b9b30344c5ddd8219945f446d47e966a6d - () https://git.kernel.org/stable/c/4507a8b9b30344c5ddd8219945f446d47e966a6d - Patch
References () https://git.kernel.org/stable/c/4dd821dcbfcecf7af6a08370b0b217cde2818acf - () https://git.kernel.org/stable/c/4dd821dcbfcecf7af6a08370b0b217cde2818acf - Patch
References () https://git.kernel.org/stable/c/a3f9314752dbb6f6aa1f0f2b4c58243bda800738 - () https://git.kernel.org/stable/c/a3f9314752dbb6f6aa1f0f2b4c58243bda800738 - Patch
References () https://git.kernel.org/stable/c/b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c - () https://git.kernel.org/stable/c/b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c - Patch
References () https://git.kernel.org/stable/c/cadf1d8e9ddcd74584ec961aeac14ac549b261d8 - () https://git.kernel.org/stable/c/cadf1d8e9ddcd74584ec961aeac14ac549b261d8 - Patch
References () https://git.kernel.org/stable/c/dd0de8cb708951cebf727aa045e8242ba651bb52 - () https://git.kernel.org/stable/c/dd0de8cb708951cebf727aa045e8242ba651bb52 - Patch
References () https://git.kernel.org/stable/c/ebad462eec93b0f701dfe4de98990e7355283801 - () https://git.kernel.org/stable/c/ebad462eec93b0f701dfe4de98990e7355283801 - Patch

27 Dec 2024, 14:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-12-27 14:15

Updated : 2025-11-03 21:17

NVD link : CVE-2024-56531

Mitre link : CVE-2024-56531

CVE.ORG link : CVE-2024-56531

JSON object : View

Products Affected

linux

CWE
CWE-667

Improper Locking