CVE-2025-71082
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btusb: revert use of devm_kzalloc in btusb This reverts commit 98921dbd00c4e ("Bluetooth: Use devm_kzalloc in btusb.c file"). In btusb_probe(), we use devm_kzalloc() to allocate the btusb data. This ties the lifetime of all the btusb data to the binding of a driver to one interface, INTF. In a driver that binds to other interfaces, ISOC and DIAG, this is an accident waiting to happen. The issue is revealed in btusb_disconnect(), where calling usb_driver_release_interface(&btusb_driver, data->intf) will have devm free the data that is also being used by the other interfaces of the driver that may not be released yet. To fix this, revert the use of devm and go back to freeing memory explicitly.
Severity
HIGH
CVSS score
7.8
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-01-13 16:16:07.780000
Last modified
2026-10-19 19:17:09.177000
View original CVE JSON
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-01-13T16:16:07.780",
"lastModified": "2026-10-19T19:17:09.177",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btusb: revert use of devm_kzalloc in btusb\n\nThis reverts commit 98921dbd00c4e (\"Bluetooth: Use devm_kzalloc in\nbtusb.c file\").\n\nIn btusb_probe(), we use devm_kzalloc() to allocate the btusb data. This\nties the lifetime of all the btusb data to the binding of a driver to\none interface, INTF. In a driver that binds to other interfaces, ISOC\nand DIAG, this is an accident waiting to happen.\n\nThe issue is revealed in btusb_disconnect(), where calling\nusb_driver_release_interface(&btusb_driver, data->intf) will have devm\nfree the data that is also being used by the other interfaces of the\ndriver that may not be released yet.\n\nTo fix this, revert the use of devm and go back to freeing memory\nexplicitly."
},
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"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nBluetooth: btusb: revertir el uso de devm_kzalloc en btusb\n\nEsto revierte el commit 98921dbd00c4e ('Bluetooth: Usar devm_kzalloc en el archivo btusb.c').\n\nEn btusb_probe(), usamos devm_kzalloc() para asignar los datos de btusb. Esto vincula la vida útil de todos los datos de btusb a la vinculación de un controlador a una interfaz, INTF. En un controlador que se vincula a otras interfaces, ISOC y DIAG, esto es un accidente a punto de ocurrir.\n\nEl problema se revela en btusb_disconnect(), donde llamar a usb_driver_release_interface(&btusb_driver, data->intf) hará que devm libere los datos que también están siendo utilizados por las otras interfaces del controlador que quizás aún no se hayan liberado.\n\nPara solucionar esto, se revierte el uso de devm y se vuelve a liberar la memoria explícitamente."
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