CVE-2024-46675 usb: dwc3: core: Prevent USB core invalid event buffer address access
A flaw in the Linux kernel's DWC3 USB driver allows invalid memory access during runtime suspend, potentially causing system crashes or SMMU faults.
- 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-2024-46675?
CVE-2024-46675 is a medium-severity vulnerability in Linux kernel, published on 13 Sep 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: core: Prevent USB core invalid event buffer address access
This commit addresses an issue where the USB core could access an invalid event buffer address during runtime suspend, potentially causing SMMU faults and other memory issues in Exynos platforms. The problem arises from the following sequence. 1. In dwc3_gadget_suspend, there is a chance of a timeout when moving the USB core to the halt state after clearing the run/stop bit by software. 2. In dwc3_core_exit, the event buffer is cleared regardless of the USB core's status, which may lead to an SMMU faults and other memory issues. if the USB core tries to access the event buffer address.
To prevent this hardware quirk on Exynos platforms, this commit ensures that the event buffer address is not cleared by software when the USB core is active during runtime suspend by checking its status before clearing the buffer address.
Which versions are affected by CVE-2024-46675?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-46675?
Apply the vendor's patch.
Is CVE-2024-46675 being exploited?
There is no known exploitation of CVE-2024-46675 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-49413, BELL-CVE-2024-46675, DEBIAN-CVE-2024-46675, GHSA-qf44-c626-28f4, UBUNTU-CVE-2024-46675.