CVE-2025-38134
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: usb: acpi: Prevent null pointer dereference in usb_acpi_add_usb4_devlink() As demonstrated by the fix for update_port_device_state, commit 12783c0b9e2c ("usb: core: Prevent null pointer dereference in update_port_device_state"), usb_hub_to_struct_hub() can return NULL in certain scenarios, such as during hub driver unbind or teardown race conditions, even if the underlying usb_device structure exists. Plus, all other places that call usb_hub_to_struct_hub() in the same file do check for NULL return values. If usb_hub_to_struct_hub() returns NULL, the subsequent access to hub->ports[udev->portnum - 1] will cause a null pointer dereference.
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-07-03 09:15:27.837000
Last modified
2026-11-05 21:18:11.110000
View original CVE JSON
{
"id": "CVE-2025-38134",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-07-03T09:15:27.837",
"lastModified": "2026-11-05T21:18:11.110",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: acpi: Prevent null pointer dereference in usb_acpi_add_usb4_devlink()\n\nAs demonstrated by the fix for update_port_device_state,\ncommit 12783c0b9e2c (\"usb: core: Prevent null pointer dereference in update_port_device_state\"),\nusb_hub_to_struct_hub() can return NULL in certain scenarios,\nsuch as during hub driver unbind or teardown race conditions,\neven if the underlying usb_device structure exists.\n\nPlus, all other places that call usb_hub_to_struct_hub() in the same file\ndo check for NULL return values.\n\nIf usb_hub_to_struct_hub() returns NULL, the subsequent access to\nhub->ports[udev->portnum - 1] will cause a null pointer dereference."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: acpi: Evitar la desreferencia de puntero nulo en usb_acpi_add_usb4_devlink(). Como se demuestra en la corrección para update_port_device_state, commit 12783c0b9e2c (\"usb: core: Evitar la desreferencia de puntero nulo en update_port_device_state\"), usb_hub_to_struct_hub() puede devolver NULL en ciertos escenarios, como durante la desvinculación del controlador del concentrador o en condiciones de ejecuciones de desmontaje, incluso si la estructura usb_device subyacente existe. Además, todos los demás lugares que llaman a usb_hub_to_struct_hub() en el mismo archivo comprueban si hay valores de retorno NULL. Si usb_hub_to_struct_hub() devuelve NULL, el acceso posterior a hub->ports[udev->portnum - 1] provocará una desreferencia de puntero nulo."
}
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"affectedData": [
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"programFiles": [
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"metrics": {
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"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
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"ssvcV203": [
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"id": "CVE-2025-38134",
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"weaknesses": [
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"source": "[email protected]",
"type": "Primary",
"description": [
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