CVE-2024-58009 Bluetooth: L2CAP: handle NULL sock pointer in l2cap_sock_alloc
A NULL pointer dereference in the Linux kernel Bluetooth L2CAP subsystem allows attackers to cause a system crash.
- 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-2024-58009?
CVE-2024-58009 is a medium-severity vulnerability in Linux kernel, published on 27 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: L2CAP: handle NULL sock pointer in l2cap_sock_alloc
A NULL sock pointer is passed into l2cap_sock_alloc() when it is called from l2cap_sock_new_connection_cb() and the error handling paths should also be aware of it.
Seemingly a more elegant solution would be to swap bt_sock_alloc() and l2cap_chan_create() calls since they are not interdependent to that moment but then l2cap_chan_create() adds the soon to be deallocated and still dummy-initialized channel to the global list accessible by many L2CAP paths. The channel would be removed from the list in short period of time but be a bit more straight-forward here and just check for NULL instead of changing the order of function calls.
Found by Linux Verification Center (linuxtesting.org) with SVACE static analysis tool.
Weakness: CWE-476
Which versions are affected by CVE-2024-58009?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-58009?
Apply the vendor's patch.
Is CVE-2024-58009 being exploited?
There is no known exploitation of CVE-2024-58009 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-58009, DEBIAN-CVE-2024-58009, GHSA-mqqf-qf5c-jg26, ROOT-OS-DEBIAN-11-CVE-2024-58009, UBUNTU-CVE-2024-58009.