Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.7.1, < 5.15.198 |
References
- https://git.kernel.org/stable/c/1e54c19eaf84ba652c4e376571093e58e144b339Patch
- https://git.kernel.org/stable/c/252714f1e8bdd542025b16321c790458014d6880Patch
- https://git.kernel.org/stable/c/c0ecb3e4451fe94f4315e6d09c4046dfbc42090bPatch
- https://git.kernel.org/stable/c/cca0e9206e3bcc63cd3e72193e60149165d493ccPatch
- https://git.kernel.org/stable/c/fdf7c640fb8a44a59b0671143d8c2f738bc48003Patch
- https://git.kernel.org/stable/c/fff9206b0907252a41eb12b7c1407b9347df18b1Patch
FAQ
What is CVE-2025-71082?
CVE-2025-71082 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 f...
How severe is CVE-2025-71082?
CVE-2025-71082 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-71082?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.