CVE-2025-39937

net: rfkill: gpio: Fix crash due to dereferencering uninitialized pointer

MEDIUM 5.5

At a glance

Source
NVD
EPSS
EPSS 0.15 % · percentile 4 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Analyzed

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

Weaknesses (CWE)

  • CWE-476 — NULL Pointer Dereference

References

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected 7d5e9737efda16535e5b54bd627ef4881d11d31f < 184f608a68f96794e8fe58cd5535014d53622cde ; affected 7d5e9737efda16535e5b54bd627ef4881d11d31f < 8793e7a8e1b60131a825457174ed6398111daeb7 ; affected 7d5e9737efda16535e5b54bd627ef4881d11d31f < ada2282259243387e6b6e89239aeb4897e62f051 ; affected 7d5e9737efda16535e5b54bd627ef4881d11d31f < 47ade5f9d70b23a119ec20b1c6504864b2543a79 ; affected 7d5e9737efda16535e5b54bd627ef4881d11d31f < 689aee35ce671aab752f159e5c8e66d7685e6887 ; affected 7d5e9737efda16535e5b54bd627ef4881d11d31f < 21ba85d9d508422ca9e6698463ff9357c928c22d
Linux · Linuxaffected 4.6 ; unaffected 0 < 4.6 ; unaffected 5.4.300 ≤ 5.4.* ; unaffected 5.10.245 ≤ 5.10.* ; unaffected 5.15.194 ≤ 5.15.* ; unaffected 6.1.154 ≤ 6.1.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD