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Vulnerability record · CVE-2025-71082 · published 13 January 2026

CVE-2025-71082: Linux kernel vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.14% · top 97.2%
7.8CVSS 3.1 base score
0.14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
30 Jul 2026Last modified by NVD

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:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/1e54c19eaf84ba652c4e376571093e58e144b339 Patch
https://git.kernel.org/stable/c/252714f1e8bdd542025b16321c790458014d6880 Patch
https://git.kernel.org/stable/c/c0ecb3e4451fe94f4315e6d09c4046dfbc42090b Patch
https://git.kernel.org/stable/c/cca0e9206e3bcc63cd3e72193e60149165d493cc Patch
https://git.kernel.org/stable/c/fdf7c640fb8a44a59b0671143d8c2f738bc48003 Patch
https://git.kernel.org/stable/c/fff9206b0907252a41eb12b7c1407b9347df18b1 Patch

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Source: NIST National Vulnerability Database (record CVE-2025-71082), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.