CVE-2025-39937 (GCVE-0-2025-39937)
Vulnerability from cvelistv5
Published
2025-10-04 07:31
Modified
2025-10-04 07:37
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 7d5e9737efda16535e5b54bd627ef4881d11d31f Version: 7d5e9737efda16535e5b54bd627ef4881d11d31f Version: 7d5e9737efda16535e5b54bd627ef4881d11d31f Version: 7d5e9737efda16535e5b54bd627ef4881d11d31f Version: 7d5e9737efda16535e5b54bd627ef4881d11d31f Version: 7d5e9737efda16535e5b54bd627ef4881d11d31f Version: 7d5e9737efda16535e5b54bd627ef4881d11d31f Version: 7d5e9737efda16535e5b54bd627ef4881d11d31f |
||
{
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"version": "0",
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"version": "5.4.300",
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{
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},
{
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"status": "unaffected",
"version": "5.15.194",
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{
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"version": "6.1.154",
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{
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"version": "6.6.108",
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{
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{
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{
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}
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}
],
"cpeApplicability": [
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: rfkill: gpio: Fix crash due to dereferencering uninitialized pointer\n\nSince commit 7d5e9737efda (\"net: rfkill: gpio: get the name and type from\ndevice property\") rfkill_find_type() gets called with the possibly\nuninitialized \"const char *type_name;\" local variable.\n\nOn x86 systems when rfkill-gpio binds to a \"BCM4752\" or \"LNV4752\"\nacpi_device, the rfkill-\u003etype is set based on the ACPI acpi_device_id:\n\n rfkill-\u003etype = (unsigned)id-\u003edriver_data;\n\nand there is no \"type\" property so device_property_read_string() will fail\nand leave type_name uninitialized, leading to a potential crash.\n\nrfkill_find_type() does accept a NULL pointer, fix the potential crash\nby initializing type_name to NULL.\n\nNote likely sofar this has not been caught because:\n\n1. Not many x86 machines actually have a \"BCM4752\"/\"LNV4752\" acpi_device\n2. The stack happened to contain NULL where type_name is stored"
}
],
"providerMetadata": {
"dateUpdated": "2025-10-04T07:37:01.924Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/184f608a68f96794e8fe58cd5535014d53622cde"
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{
"url": "https://git.kernel.org/stable/c/8793e7a8e1b60131a825457174ed6398111daeb7"
},
{
"url": "https://git.kernel.org/stable/c/ada2282259243387e6b6e89239aeb4897e62f051"
},
{
"url": "https://git.kernel.org/stable/c/47ade5f9d70b23a119ec20b1c6504864b2543a79"
},
{
"url": "https://git.kernel.org/stable/c/689aee35ce671aab752f159e5c8e66d7685e6887"
},
{
"url": "https://git.kernel.org/stable/c/21ba85d9d508422ca9e6698463ff9357c928c22d"
},
{
"url": "https://git.kernel.org/stable/c/21a39b958b4bcf44f7674bfbbe1bbb8cad0d842d"
},
{
"url": "https://git.kernel.org/stable/c/b6f56a44e4c1014b08859dcf04ed246500e310e5"
}
],
"title": "net: rfkill: gpio: Fix crash due to dereferencering uninitialized pointer",
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"assignerShortName": "Linux",
"cveId": "CVE-2025-39937",
"datePublished": "2025-10-04T07:31:00.879Z",
"dateReserved": "2025-04-16T07:20:57.148Z",
"dateUpdated": "2025-10-04T07:37:01.924Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-39937\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-04T08:15:46.593\",\"lastModified\":\"2025-10-06T14:56:47.823\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: rfkill: gpio: Fix crash due to dereferencering uninitialized pointer\\n\\nSince commit 7d5e9737efda (\\\"net: rfkill: gpio: get the name and type from\\ndevice property\\\") rfkill_find_type() gets called with the possibly\\nuninitialized \\\"const char *type_name;\\\" local variable.\\n\\nOn x86 systems when rfkill-gpio binds to a \\\"BCM4752\\\" or \\\"LNV4752\\\"\\nacpi_device, the rfkill-\u003etype is set based on the ACPI acpi_device_id:\\n\\n rfkill-\u003etype = (unsigned)id-\u003edriver_data;\\n\\nand there is no \\\"type\\\" property so device_property_read_string() will fail\\nand leave type_name uninitialized, leading to a potential crash.\\n\\nrfkill_find_type() does accept a NULL pointer, fix the potential crash\\nby initializing type_name to NULL.\\n\\nNote likely sofar this has not been caught because:\\n\\n1. Not many x86 machines actually have a \\\"BCM4752\\\"/\\\"LNV4752\\\" acpi_device\\n2. The stack happened to contain NULL where type_name is stored\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/184f608a68f96794e8fe58cd5535014d53622cde\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/21a39b958b4bcf44f7674bfbbe1bbb8cad0d842d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/21ba85d9d508422ca9e6698463ff9357c928c22d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/47ade5f9d70b23a119ec20b1c6504864b2543a79\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/689aee35ce671aab752f159e5c8e66d7685e6887\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8793e7a8e1b60131a825457174ed6398111daeb7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ada2282259243387e6b6e89239aeb4897e62f051\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b6f56a44e4c1014b08859dcf04ed246500e310e5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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