CVE-2026-68392 Bluetooth: mgmt: fix locking in unpair_device/disconnect_sync
A use-after-free vulnerability in the Linux kernel Bluetooth management allows attackers to potentially execute code or cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-68392?
CVE-2026-68392 is a high-severity use after free vulnerability in Linux, published on 10 Aug 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: mgmt: fix locking in unpair_device/disconnect_sync
Dereferencing RCU-protected pointers outside critical sections is invalid and may lead to UAF.
Take hdev->lock for hci_conn lookup and hci_abort_conn(). Don't use RCU to ensure the conn is fully initialized at this point.
Which versions are affected by CVE-2026-68392?
How do I fix CVE-2026-68392?
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-2026-68392 being exploited?
There is no known exploitation of CVE-2026-68392 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68392, DEBIAN-CVE-2026-68392, GHSA-29hq-hf65-36hv, UBUNTU-CVE-2026-68392.