CVE-2021-47170

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-47170
In the Linux kernel, the following vulnerability has been resolved: USB: usbfs: Don't WARN about excessively large memory allocations Syzbot found that the kernel generates a WARNing if the user tries to submit a bulk transfer through usbfs with a buffer that is way too large. This isn't a bug in the kernel; it's merely an invalid request from the user and the usbfs code does handle it correctly. In theory the same thing can happen with async transfers, or with the packet descriptor table for isochronous transfers. To prevent the MM subsystem from complaining about these bad allocation requests, add the __GFP_NOWARN flag to the kmalloc calls for these buffers.

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/2ab21d6e1411999b5fb43434f421f00bf50002eb Patch
https://git.kernel.org/stable/c/2c835fede13e03f2743a333e4370b5ed2db91e83 Patch
https://git.kernel.org/stable/c/4f2629ea67e7225c3fd292c7fe4f5b3c9d6392de Patch
https://git.kernel.org/stable/c/8d83f109e920d2776991fa142bb904d985dca2ed Patch
https://git.kernel.org/stable/c/9f7cb3f01a10d9064cf13b3d26fb7e7a5827d098 Patch
https://git.kernel.org/stable/c/2ab21d6e1411999b5fb43434f421f00bf50002eb Patch
https://git.kernel.org/stable/c/2c835fede13e03f2743a333e4370b5ed2db91e83 Patch
https://git.kernel.org/stable/c/4f2629ea67e7225c3fd292c7fe4f5b3c9d6392de Patch
https://git.kernel.org/stable/c/8d83f109e920d2776991fa142bb904d985dca2ed Patch
https://git.kernel.org/stable/c/9f7cb3f01a10d9064cf13b3d26fb7e7a5827d098 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:5.13:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*
History

17 Mar 2025, 15:03

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CWE CWE-770
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux linux Kernel
Linux
References () https://git.kernel.org/stable/c/2ab21d6e1411999b5fb43434f421f00bf50002eb - () https://git.kernel.org/stable/c/2ab21d6e1411999b5fb43434f421f00bf50002eb - Patch
References () https://git.kernel.org/stable/c/2c835fede13e03f2743a333e4370b5ed2db91e83 - () https://git.kernel.org/stable/c/2c835fede13e03f2743a333e4370b5ed2db91e83 - Patch
References () https://git.kernel.org/stable/c/4f2629ea67e7225c3fd292c7fe4f5b3c9d6392de - () https://git.kernel.org/stable/c/4f2629ea67e7225c3fd292c7fe4f5b3c9d6392de - Patch
References () https://git.kernel.org/stable/c/8d83f109e920d2776991fa142bb904d985dca2ed - () https://git.kernel.org/stable/c/8d83f109e920d2776991fa142bb904d985dca2ed - Patch
References () https://git.kernel.org/stable/c/9f7cb3f01a10d9064cf13b3d26fb7e7a5827d098 - () https://git.kernel.org/stable/c/9f7cb3f01a10d9064cf13b3d26fb7e7a5827d098 - Patch

21 Nov 2024, 06:35

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/2ab21d6e1411999b5fb43434f421f00bf50002eb - () https://git.kernel.org/stable/c/2ab21d6e1411999b5fb43434f421f00bf50002eb -
References () https://git.kernel.org/stable/c/2c835fede13e03f2743a333e4370b5ed2db91e83 - () https://git.kernel.org/stable/c/2c835fede13e03f2743a333e4370b5ed2db91e83 -
References () https://git.kernel.org/stable/c/4f2629ea67e7225c3fd292c7fe4f5b3c9d6392de - () https://git.kernel.org/stable/c/4f2629ea67e7225c3fd292c7fe4f5b3c9d6392de -
References () https://git.kernel.org/stable/c/8d83f109e920d2776991fa142bb904d985dca2ed - () https://git.kernel.org/stable/c/8d83f109e920d2776991fa142bb904d985dca2ed -
References () https://git.kernel.org/stable/c/9f7cb3f01a10d9064cf13b3d26fb7e7a5827d098 - () https://git.kernel.org/stable/c/9f7cb3f01a10d9064cf13b3d26fb7e7a5827d098 -

25 Mar 2024, 13:47

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: USB: usbfs: No ADVERTIR sobre asignaciones de memoria excesivamente grandes. Syzbot descubrió que el kernel genera una ADVERTENCIA si el usuario intenta enviar una transferencia masiva a través de usbfs con un búfer demasiado grande. Esto no es un error en el kernel; es simplemente una solicitud no válida del usuario y el código usbfs la maneja correctamente. En teoría, lo mismo puede suceder con las transferencias asíncronas o con la tabla de descriptores de paquetes para transferencias isócronas. Para evitar que el subsistema MM se queje de estas solicitudes de asignación incorrectas, agregue el indicador __GFP_NOWARN a las llamadas kmalloc para estos búferes.

25 Mar 2024, 10:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-03-25 10:15

Updated : 2025-03-17 15:03

NVD link : CVE-2021-47170

Mitre link : CVE-2021-47170

CVE.ORG link : CVE-2021-47170

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-770

Allocation of Resources Without Limits or Throttling