An issue was discovered in the Linux kernel before 5.11.7. usbip_sockfd_store in drivers/usb/usbip/stub_dev.c allows attackers to cause a denial of service (GPF) because the stub-up sequence has race conditions during an update of the local and shared status, aka CID-9380afd6df70.
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.7