CVE-2024-42132 bluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX
A missing bounds check in the Linux kernel Bluetooth HCI subsystem allows a local attacker to trigger a kernel warning and potential denial of service.
- 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-2024-42132?
CVE-2024-42132 is a high-severity vulnerability in Linux kernel, published on 30 Jul 2024. 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: disallow setting handle bigger than HCI_CONN_HANDLE_MAX
Syzbot hit warning in hci_conn_del() caused by freeing handle that was not allocated using ida allocator.
This is caused by handle bigger than HCI_CONN_HANDLE_MAX passed by hci_le_big_sync_established_evt(), which makes code think it's unset connection.
Add same check for handle upper bound as in hci_conn_set_handle() to prevent warning.
Weakness: CWE-763
Which versions are affected by CVE-2024-42132?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-42132?
Apply the vendor's patch.
Is CVE-2024-42132 being exploited?
There is no known exploitation of CVE-2024-42132 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-42132, DEBIAN-CVE-2024-42132, GHSA-6fvx-97p6-hw44, UBUNTU-CVE-2024-42132.