CVE-2024-35822 usb: udc: remove warning when queue disabled ep
A race condition in the Linux kernel USB gadget driver can trigger a kernel warning, potentially leading to system instability or 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-2024-35822?
CVE-2024-35822 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 17 May 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:
usb: udc: remove warning when queue disabled ep
It is possible trigger below warning message from mass storage function,
WARNING: CPU: 6 PID: 3839 at drivers/usb/gadget/udc/core.c:294 usb_ep_queue+0x7c/0x104 pc : usb_ep_queue+0x7c/0x104 lr : fsg_main_thread+0x494/0x1b3c
Root cause is mass storage function try to queue request from main thread, but other thread may already disable ep when function disable.
As there is no function failure in the driver, in order to avoid effort to fix warning, change WARN_ON_ONCE() in usb_ep_queue() to pr_debug().
Which versions are affected by CVE-2024-35822?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2024-35822?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-35822 being exploited?
There is no known exploitation of CVE-2024-35822 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as BELL-CVE-2024-35822, DEBIAN-CVE-2024-35822, GHSA-2q67-rw6p-rcj4, UBUNTU-CVE-2024-35822.