CVE-2025-39937

MEDIUM EPSS 3.2%
Published Oct 4, 20259mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Oct 4, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

Description

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

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
3.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 13

VendorProductVersionRange
linuxlinux_kernel*≥4.6  –  <5.4.300
linuxlinux_kernel*≥5.5  –  <5.10.245
linuxlinux_kernel*≥5.11  –  <5.15.194
linuxlinux_kernel*≥5.16  –  <6.1.154
linuxlinux_kernel*≥6.2  –  <6.6.108
linuxlinux_kernel*≥6.7  –  <6.12.49
linuxlinux_kernel*≥6.13  –  <6.16.9
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/184f608a68f96794e8fe58cd5535014d53622cde
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/21a39b958b4bcf44f7674bfbbe1bbb8cad0d842d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/21ba85d9d508422ca9e6698463ff9357c928c22d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/47ade5f9d70b23a119ec20b1c6504864b2543a79
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/689aee35ce671aab752f159e5c8e66d7685e6887
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8793e7a8e1b60131a825457174ed6398111daeb7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ada2282259243387e6b6e89239aeb4897e62f051
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b6f56a44e4c1014b08859dcf04ed246500e310e5
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/184f608a68f96794e8fe58cd5535014d53622cde
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/21a39b958b4bcf44f7674bfbbe1bbb8cad0d842d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/21ba85d9d508422ca9e6698463ff9357c928c22d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/47ade5f9d70b23a119ec20b1c6504864b2543a79
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/689aee35ce671aab752f159e5c8e66d7685e6887
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8793e7a8e1b60131a825457174ed6398111daeb7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ada2282259243387e6b6e89239aeb4897e62f051
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b6f56a44e4c1014b08859dcf04ed246500e310e5
    Patch