Use-after-free in Linux kernel - CVE-2026-64471
Published: July 27, 2026
Vulnerability identifier: #VU139467
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-64471
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker to cause a denial of service.
The vulnerability exists due to use-after-free in the btusb driver probe error handling in drivers/bluetooth/btusb.c when handling Bluetooth USB controller registration failures and subsequent interface disconnection. A local attacker can trigger controller registration failure to cause a denial of service.
The issue can also result in a double-free when the sibling interfaces are eventually disconnected.
Affected software
Linux kernel
How to mitigate CVE-2026-64471
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External 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