CVE-2025-39937

Advisory lineage Upstream: 0 Downstream: 44
Analyzed
Published: 04 Oct 2025, 07:31
Last modified:11 May 2026, 21:39

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.03% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

04 Oct 2025, 07:31
Published
Vulnerability first disclosed
11 May 2026, 21:39
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.03%• Percentile: 9%

Techniques & Countermeasures

  • CWE-476•NULL Pointer Dereference

    The product dereferences a pointer that it expects to be valid but is NULL.

Affected Systems

  • linux•linux

    ≥ 7d5e9737efda16535e5b54bd627ef4881d11d31f, < 184f608a68f96794e8fe58cd5535014d53622cde | ≥ 7d5e9737efda16535e5b54bd627ef4881d11d31f, < 8793e7a8e1b60131a825457174ed6398111daeb7 | ≥ 7d5e9737efda16535e5b54bd627ef4881d11d31f, < ada2282259243387e6b6e89239aeb4897e62f051 | ≥ 7d5e9737efda16535e5b54bd627ef4881d11d31f, < 47ade5f9d70b23a119ec20b1c6504864b2543a79 | ≥ 7d5e9737efda16535e5b54bd627ef4881d11d31f, < 689aee35ce671aab752f159e5c8e66d7685e6887 | ≥ 7d5e9737efda16535e5b54bd627ef4881d11d31f, < 21ba85d9d508422ca9e6698463ff9357c928c22d | ≥ 7d5e9737efda16535e5b54bd627ef4881d11d31f, < 21a39b958b4bcf44f7674bfbbe1bbb8cad0d842d | ≥ 7d5e9737efda16535e5b54bd627ef4881d11d31f, < b6f56a44e4c1014b08859dcf04ed246500e310e5 | 4.6

  • linux•linux_kernel

    ≥ 4.6, < 5.4.300 | ≥ 5.5, < 5.10.245 | ≥ 5.11, < 5.15.194 | ≥ 5.16, < 6.1.154 | ≥ 6.2, < 6.6.108 | ≥ 6.7, < 6.12.49 | ≥ 6.13, < 6.16.9 | 6.17:rc1 | 6.17:rc2 | 6.17:rc3 | 6.17:rc4 | 6.17:rc5 | 6.17:rc6

References (8)