CVE-2026-64471: Bluetooth: btusb: fix use-after-free on registration failure

Severity: unknown
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-25 · updated 2026-08-17

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.

Affected products

Linux kernel: 2.6.27 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/14e02f1449ba425a44dedbec9a21efafb056e09f
https://git.kernel.org/stable/c/1ce5012944afaddbda939ec6bae9800fce84abbc
https://git.kernel.org/stable/c/468fcdfaeb937163dd250773a9fed17ab1fa203c
https://git.kernel.org/stable/c/8db0ce3de78367f61c2970c0f16d9adee8830a23
https://git.kernel.org/stable/c/da7d7758fe884b256ddc9fef562e5ddef7952383
https://git.kernel.org/stable/c/e09ac7d0c6859a360bf36e7104aef03f88184e0b
https://git.kernel.org/stable/c/e6313b800da61a26c2fdd5eba0105e197c0ab3bc
https://git.kernel.org/stable/c/eedc6867ebad73edbfaf9a0a65fbef7115cc4753

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