CVE-2025-38134

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  3. CVE-2025-38134

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: usb: acpi: Prevent null pointer dereference in usb_acpi_add_usb4_devlink() As demonstrated by the fix for update_port_device_state, commit 12783c0b9e2c ("usb: core: Prevent null pointer dereference in update_port_device_state"), usb_hub_to_struct_hub() can return NULL in certain scenarios, such as during hub driver unbind or teardown race conditions, even if the underlying usb_device structure exists. Plus, all other places that call usb_hub_to_struct_hub() in the same file do check for NULL return values. If usb_hub_to_struct_hub() returns NULL, the subsequent access to hub->ports[udev->portnum - 1] will cause a null pointer dereference.

References
Link Resource
https://git.kernel.org/stable/c/73fb0ec9436ae87bcae067ce35d6cdd72bade86c Patch
https://git.kernel.org/stable/c/8fa544bff8466062e42949c93f3e528f4be5624b Patch
https://git.kernel.org/stable/c/e3d530173b70514d4390a94f9f979acad689b70a Patch
Configurations

Configuration 1 (hide)

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

20 Nov 2025, 20:11

Type Values Removed Values Added
First Time Linux linux Kernel
Linux
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: acpi: Evitar la desreferencia de puntero nulo en usb_acpi_add_usb4_devlink(). Como se demuestra en la corrección para update_port_device_state, commit 12783c0b9e2c ("usb: core: Evitar la desreferencia de puntero nulo en update_port_device_state"), usb_hub_to_struct_hub() puede devolver NULL en ciertos escenarios, como durante la desvinculación del controlador del concentrador o en condiciones de ejecuciones de desmontaje, incluso si la estructura usb_device subyacente existe. Además, todos los demás lugares que llaman a usb_hub_to_struct_hub() en el mismo archivo comprueban si hay valores de retorno NULL. Si usb_hub_to_struct_hub() devuelve NULL, el acceso posterior a hub->ports[udev->portnum - 1] provocará una desreferencia de puntero nulo.
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CWE CWE-476
References () https://git.kernel.org/stable/c/73fb0ec9436ae87bcae067ce35d6cdd72bade86c - () https://git.kernel.org/stable/c/73fb0ec9436ae87bcae067ce35d6cdd72bade86c - Patch
References () https://git.kernel.org/stable/c/8fa544bff8466062e42949c93f3e528f4be5624b - () https://git.kernel.org/stable/c/8fa544bff8466062e42949c93f3e528f4be5624b - Patch
References () https://git.kernel.org/stable/c/e3d530173b70514d4390a94f9f979acad689b70a - () https://git.kernel.org/stable/c/e3d530173b70514d4390a94f9f979acad689b70a - Patch

03 Jul 2025, 09:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-07-03 09:15

Updated : 2025-11-20 20:11

NVD link : CVE-2025-38134

Mitre link : CVE-2025-38134

CVE.ORG link : CVE-2025-38134

JSON object : View

Products Affected

linux

CWE
CWE-476

NULL Pointer Dereference