CVE-2026-31727

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> usb: gadget: u_ether: Fix NULL pointer deref in eth_get_drvinfo<br /> <br /> Commit ec35c1969650 ("usb: gadget: f_ncm: Fix net_device lifecycle with<br /> device_move") reparents the gadget device to /sys/devices/virtual during<br /> unbind, clearing the gadget pointer. If the userspace tool queries on<br /> the surviving interface during this detached window, this leads to a<br /> NULL pointer dereference.<br /> <br /> Unable to handle kernel NULL pointer dereference<br /> Call trace:<br /> eth_get_drvinfo+0x50/0x90<br /> ethtool_get_drvinfo+0x5c/0x1f0<br /> __dev_ethtool+0xaec/0x1fe0<br /> dev_ethtool+0x134/0x2e0<br /> dev_ioctl+0x338/0x560<br /> <br /> Add a NULL check for dev-&gt;gadget in eth_get_drvinfo(). When detached,<br /> skip copying the fw_version and bus_info strings, which is natively<br /> handled by ethtool_get_drvinfo for empty strings.