CVE-2026-64471
Received Received - Intake

Bluetooth: btusb Use-After-Free on Registration Failure

Publication date: 2026-07-25

Last updated on: 2026-07-25

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btusb: fix use-after-free on registration failure Make sure to release the sibling interfaces in case controller registration fails to avoid use-after-free and double-free when they are eventually disconnected. This issue was reported by Sashiko while reviewing a fix for a wakeup source leak in the btusb probe errors paths.

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Meta Information

Published
2026-07-25
Last Modified
2026-07-25
Generated
2026-07-25
AI Q&A
2026-07-25
EPSS Evaluated
N/A
NVD
CVE-2026-64471
EUVD
EUVD-2026-48815

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a use-after-free vulnerability in the Linux kernel's Bluetooth USB driver (btusb). It occurs when controller registration fails and sibling interfaces are not properly released, leading to potential memory corruption issues.

Detection Guidance

This vulnerability is specific to the Linux kernel's Bluetooth subsystem (btusb) and may not have direct network detection methods. Check kernel logs for Bluetooth-related errors or crashes using: dmesg | grep -i bluetooth or journalctl -k | grep -i bluetooth. If you suspect exploitation, monitor for unexpected Bluetooth device disconnections or kernel panics.

Impact Analysis

If exploited, this could cause system crashes, instability, or privilege escalation. Users might experience Bluetooth device malfunctions or unexpected system behavior.

Mitigation Strategies

Update your Linux kernel to the latest stable version that includes the fix for CVE-2026-64471. If immediate patching is not possible, disable the Bluetooth subsystem temporarily using: sudo systemctl stop bluetooth or blacklist the btusb module with echo 'blacklist btusb' | sudo tee /etc/modprobe.d/blacklist-btusb.conf.

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