CVE-2026-64471 Bluetooth: btusb: fix use-after-free on registration failure
A use-after-free vulnerability in the Linux kernel Bluetooth USB driver allows local attackers to cause a denial of service or potentially execute code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-64471?
CVE-2026-64471 is an use after free vulnerability in Linux, published on 25 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-64471?
How do I fix CVE-2026-64471?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-64471 being exploited?
There is no known exploitation of CVE-2026-64471 in the wild and no public exploit code.
Sources
Also known as AZL-93449, BELL-CVE-2026-64471, DEBIAN-CVE-2026-64471, GHSA-h76x-2h2r-8jw4, ROOT-OS-UBUNTU-2204-CVE-2026-64471, UBUNTU-CVE-2026-64471.