🛡️ CVE-2025-71082 — kernel

🟠 CVSS 7.8 — High ✅ No Known Exploit NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Bluetooth: btusb: revert use of devm_kzalloc in btusb

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Affected software

CVE-2025-71082 is recorded against 2 packages.

  • kernel (from 6.13.0 up to 6.18.4)
  • linux-kernel

Timeline and source

Published on 13 January 2026 and last revised on 6 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2025-71082 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity High
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2026-01-13
Updated 2026-08-12
Modified 2026-08-06

Affected Packages

Software From version Fixed in
kernel 6.13.0 6.18.4
linux-kernel — —

Similar Threats

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