CVE-2024-36479

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2024-36479
In the Linux kernel, the following vulnerability has been resolved: fpga: bridge: add owner module and take its refcount The current implementation of the fpga bridge assumes that the low-level module registers a driver for the parent device and uses its owner pointer to take the module's refcount. This approach is problematic since it can lead to a null pointer dereference while attempting to get the bridge if the parent device does not have a driver. To address this problem, add a module owner pointer to the fpga_bridge struct and use it to take the module's refcount. Modify the function for registering a bridge to take an additional owner module parameter and rename it to avoid conflicts. Use the old function name for a helper macro that automatically sets the module that registers the bridge as the owner. This ensures compatibility with existing low-level control modules and reduces the chances of registering a bridge without setting the owner. Also, update the documentation to keep it consistent with the new interface for registering an fpga bridge. Other changes: opportunistically move put_device() from __fpga_bridge_get() to fpga_bridge_get() and of_fpga_bridge_get() to improve code clarity since the bridge device is taken in these functions.

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/18dc8366abb6cadcb77668b1a16434654e355d49 Patch
https://git.kernel.org/stable/c/1da11f822042eb6ef4b6064dc048f157a7852529 Patch
https://git.kernel.org/stable/c/6896b6b2e2d9ec4e1b0acb4c1698a75a4b34d125 Patch
https://git.kernel.org/stable/c/d7c4081c54a1d4068de9440957303a76f9e5c95b Patch
https://git.kernel.org/stable/c/1da11f822042eb6ef4b6064dc048f157a7852529 Patch
https://git.kernel.org/stable/c/6896b6b2e2d9ec4e1b0acb4c1698a75a4b34d125 Patch
https://git.kernel.org/stable/c/d7c4081c54a1d4068de9440957303a76f9e5c95b 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:*:*:*:*:*:*:*:*
History

03 Feb 2025, 15:53

Type Values Removed Values Added
First Time Linux linux Kernel
Linux
CWE CWE-476
References () https://git.kernel.org/stable/c/18dc8366abb6cadcb77668b1a16434654e355d49 - () https://git.kernel.org/stable/c/18dc8366abb6cadcb77668b1a16434654e355d49 - Patch
References () https://git.kernel.org/stable/c/1da11f822042eb6ef4b6064dc048f157a7852529 - () https://git.kernel.org/stable/c/1da11f822042eb6ef4b6064dc048f157a7852529 - Patch
References () https://git.kernel.org/stable/c/6896b6b2e2d9ec4e1b0acb4c1698a75a4b34d125 - () https://git.kernel.org/stable/c/6896b6b2e2d9ec4e1b0acb4c1698a75a4b34d125 - Patch
References () https://git.kernel.org/stable/c/d7c4081c54a1d4068de9440957303a76f9e5c95b - () https://git.kernel.org/stable/c/d7c4081c54a1d4068de9440957303a76f9e5c95b - Patch
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

14 Dec 2024, 21:15

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/18dc8366abb6cadcb77668b1a16434654e355d49 -

21 Nov 2024, 09:22

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/1da11f822042eb6ef4b6064dc048f157a7852529 - () https://git.kernel.org/stable/c/1da11f822042eb6ef4b6064dc048f157a7852529 -
References () https://git.kernel.org/stable/c/6896b6b2e2d9ec4e1b0acb4c1698a75a4b34d125 - () https://git.kernel.org/stable/c/6896b6b2e2d9ec4e1b0acb4c1698a75a4b34d125 -
References () https://git.kernel.org/stable/c/d7c4081c54a1d4068de9440957303a76f9e5c95b - () https://git.kernel.org/stable/c/d7c4081c54a1d4068de9440957303a76f9e5c95b -
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fpga: puente: agrega el módulo propietario y toma su recuento. La implementación actual del puente fpga supone que el módulo de bajo nivel registra un controlador para el dispositivo principal y utiliza su puntero de propietario para tomar el recuento del módulo. Este enfoque es problemático ya que puede provocar una desreferencia del puntero nulo al intentar obtener el puente si el dispositivo principal no tiene un controlador. Para solucionar este problema, agregue un puntero de propietario de módulo a la estructura fpga_bridge y utilícelo para tomar el recuento del módulo. Modifique la función para registrar un puente para tomar un parámetro de módulo propietario adicional y cambiarle el nombre para evitar conflictos. Utilice el nombre de función anterior para una macro auxiliar que configura automáticamente el módulo que registra el puente como propietario. Esto garantiza la compatibilidad con los módulos de control de bajo nivel existentes y reduce las posibilidades de registrar un puente sin configurar el propietario. Además, actualice la documentación para que sea coherente con la nueva interfaz para registrar un puente fpga. Otros cambios: mueva de manera oportunista put_device() de __fpga_bridge_get() a fpga_bridge_get() y of_fpga_bridge_get() para mejorar la claridad del código ya que el dispositivo puente se toma en estas funciones.

24 Jun 2024, 14:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-06-24 14:15

Updated : 2025-02-03 15:53

NVD link : CVE-2024-36479

Mitre link : CVE-2024-36479

CVE.ORG link : CVE-2024-36479

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference