CVE-2022-49136 Bluetooth: hci_sync: Fix queuing commands when HCI_UNREGISTER is set
A use-after-free vulnerability in the Linux kernel Bluetooth subsystem 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-2022-49136?
CVE-2022-49136 is a high-severity use after free vulnerability in Linux kernel, published on 26 Feb 2025. 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: hci_sync: Fix queuing commands when HCI_UNREGISTER is set
hci_cmd_sync_queue shall return an error if HCI_UNREGISTER flag has been set as that means hci_unregister_dev has been called so it will likely cause a uaf after the timeout as the hdev will be freed.
Weakness: CWE-416
Which versions are affected by CVE-2022-49136?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49136?
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-2022-49136 being exploited?
There is no known exploitation of CVE-2022-49136 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49136, GHSA-g48q-f43r-rjjg, ROOT-OS-UBUNTU-2204-CVE-2022-49136, UBUNTU-CVE-2022-49136.