Tracker / CVE-2025-39937
CVE-2025-39937
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: rfkill->type = (unsigned)id->driver_data; and there is no "type" property so device_property_read_string() will fail and leave type_name uninitialized, leading to a potential crash. 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
Affected products and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 4.6 → 5.4.300 |
| linux | linux_kernel · 5.11 → 5.15.194 |
| linux | linux_kernel · 5.16 → 6.1.154 |
| linux | linux_kernel · 5.5 → 5.10.245 |
| linux | linux_kernel · 6.13 → 6.16.9 |
| linux | linux_kernel · 6.2 → 6.6.108 |
| linux | linux_kernel · 6.7 → 6.12.49 |