CVE-2025-39937
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
net: rfkill: gpio: Fix crash due to dereferencering uninitialized pointer
Since commit 7d5e9737efda ("net: rfkill: gpio: get the name and type from device property") rfkill_find_type() gets called with the possibly uninitialized "const char *type_name;" local variable.
On x86 systems when rfkill-gpio binds to a "BCM4752" or "LNV4752" acpi_device, the rfkill->type is set based on the ACPI acpi_device_id:
and there is no "type" property so device_property_read_string() will fail and leave type_name uninitialized, leading to a potential crash.
Leer descripción completaMostrar menos
rfkill_find_type() does accept a NULL pointer, fix the potential crash by initializing type_name to NULL.
Note likely sofar this has not been caught because:
1. Not many x86 machines actually have a "BCM4752"/"LNV4752" acpi_device 2. The stack happened to contain NULL where type_name is stored
Detalles técnicos trazas, registros y código del informe original
rfkill->type = (unsigned)id->driver_data;
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.15%
- Percentil entre todas las CVEs puntuadas: 3
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-476
Referencias
- https://git.kernel.org/stable/c/184f608a68f96794e8fe58cd5535014d53622cde
- https://git.kernel.org/stable/c/21a39b958b4bcf44f7674bfbbe1bbb8cad0d842d
- https://git.kernel.org/stable/c/21ba85d9d508422ca9e6698463ff9357c928c22d
- https://git.kernel.org/stable/c/47ade5f9d70b23a119ec20b1c6504864b2543a79
- https://git.kernel.org/stable/c/689aee35ce671aab752f159e5c8e66d7685e6887
- https://git.kernel.org/stable/c/8793e7a8e1b60131a825457174ed6398111daeb7
- https://git.kernel.org/stable/c/ada2282259243387e6b6e89239aeb4897e62f051
- https://git.kernel.org/stable/c/b6f56a44e4c1014b08859dcf04ed246500e310e5
JSON original (NVD)
Mostrar
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