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CVE-2025-71082

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.…

Published Jan 13, 2026EPSS 0.14%

Overview

CVE-2025-71082 is a high-severity vulnerability. It was published on January 13, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/1e54c19eaf84ba652c4e376571093e58e144b339Refgit.kernel.org/stable/c/252714f1e8bdd542025b16321c790458014d6880Refgit.kernel.org/stable/c/c0ecb3e4451fe94f4315e6d09c4046dfbc42090bRefgit.kernel.org/stable/c/cca0e9206e3bcc63cd3e72193e60149165d493ccRefgit.kernel.org/stable/c/fdf7c640fb8a44a59b0671143d8c2f738bc48003Refgit.kernel.org/stable/c/fff9206b0907252a41eb12b7c1407b9347df18b1

How CyberStrike helps

Frequently asked questions

What is CVE-2025-71082?

CVE-2025-71082 is a high-severity vulnerability. It was published on January 13, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-71082?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-71082?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-71082?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-71082 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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