CVE-2025-38376

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> usb: chipidea: udc: disconnect/reconnect from host when do suspend/resume<br /> <br /> Shawn and John reported a hang issue during system suspend as below:<br /> <br /> - USB gadget is enabled as Ethernet<br /> - There is data transfer over USB Ethernet (scp a big file between host<br /> and device)<br /> - Device is going in/out suspend (echo mem &gt; /sys/power/state)<br /> <br /> The root cause is the USB device controller is suspended but the USB bus<br /> is still active which caused the USB host continues to transfer data with<br /> device and the device continues to queue USB requests (in this case, a<br /> delayed TCP ACK packet trigger the issue) after controller is suspended,<br /> however the USB controller clock is already gated off. Then if udc driver<br /> access registers after that point, the system will hang.<br /> <br /> The correct way to avoid such issue is to disconnect device from host when<br /> the USB bus is not at suspend state. Then the host will receive disconnect<br /> event and stop data transfer in time. To continue make USB gadget device<br /> work after system resume, this will reconnect device automatically.<br /> <br /> To make usb wakeup work if USB bus is already at suspend state, this will<br /> keep connection for it only when USB device controller has enabled wakeup<br /> capability.