CVE-2025-39937

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Source
https://cve.org/CVERecord?id=CVE-2025-39937
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-39937.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-39937
Downstream
Related
Published
2025-10-04T07:31:00.879Z
Modified
2026-05-18T05:56:19.956670524Z
Summary
net: rfkill: gpio: Fix crash due to dereferencering uninitialized pointer
Details

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") rfkillfindtype() gets called with the possibly uninitialized "const char *type_name;" local variable.

On x86 systems when rfkill-gpio binds to a "BCM4752" or "LNV4752" acpidevice, the rfkill->type is set based on the ACPI acpidevice_id:

    rfkill->type = (unsigned)id->driver_data;

and there is no "type" property so devicepropertyreadstring() will fail and leave typename uninitialized, leading to a potential crash.

rfkillfindtype() 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
Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39937.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
7d5e9737efda16535e5b54bd627ef4881d11d31f
Fixed
184f608a68f96794e8fe58cd5535014d53622cde
Fixed
8793e7a8e1b60131a825457174ed6398111daeb7
Fixed
ada2282259243387e6b6e89239aeb4897e62f051
Fixed
47ade5f9d70b23a119ec20b1c6504864b2543a79
Fixed
689aee35ce671aab752f159e5c8e66d7685e6887
Fixed
21ba85d9d508422ca9e6698463ff9357c928c22d
Fixed
21a39b958b4bcf44f7674bfbbe1bbb8cad0d842d
Fixed
b6f56a44e4c1014b08859dcf04ed246500e310e5

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-39937.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
4.6.0
Fixed
5.4.300
Type
ECOSYSTEM
Events
Introduced
5.5.0
Fixed
5.10.245
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.194
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.154
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.108
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.49
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.16.9

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-39937.json"