CVE-2024-26715 usb: dwc3: gadget: Fix NULL pointer dereference in dwc3_gadget_suspend
A race condition in the Linux kernel USB gadget driver can cause a NULL pointer dereference, leading to a system crash during rapid USB plug-out and plug-in events.
- 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-2024-26715?
CVE-2024-26715 is a medium-severity vulnerability in Linux kernel, published on 3 Apr 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: dwc3: gadget: Fix NULL pointer dereference in dwc3_gadget_suspend
In current scenario if Plug-out and Plug-In performed continuously there could be a chance while checking for dwc->gadget_driver in dwc3_gadget_suspend, a NULL pointer dereference may occur.
Call Stack:
CPU1: CPU2: gadget_unbind_driver dwc3_suspend_common dwc3_gadget_stop dwc3_gadget_suspend dwc3_disconnect_gadget
CPU1 basically clears the variable and CPU2 checks the variable. Consider CPU1 is running and right before gadget_driver is cleared and in parallel CPU2 executes dwc3_gadget_suspend where it finds dwc->gadget_driver which is not NULL and resumes execution and then CPU1 completes execution. CPU2 executes dwc3_disconnect_gadget where it checks dwc->gadget_driver is already NULL because of which the NULL pointer deference occur.
Weakness: CWE-476
Which versions are affected by CVE-2024-26715?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-26715?
Apply the vendor's patch.
Is CVE-2024-26715 being exploited?
There is no known exploitation of CVE-2024-26715 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-26715, DEBIAN-CVE-2024-26715, GHSA-97mp-32j5-q87r, ROOT-OS-DEBIAN-11-CVE-2024-26715, UBUNTU-CVE-2024-26715.