{"cve":"CVE-2026-31722","nvd":{"published":"2026-05-01T15:16:34.617","modified":"2026-10-21T13:18:41.733","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_rndis: Fix net_device lifecycle with device_move\n\nThe net_device is allocated during function instance creation and\nregistered during the bind phase with the gadget device as its sysfs\nparent. When the function unbinds, the parent device is destroyed, but\nthe net_device survives, resulting in dangling sysfs symlinks:\n\n  console:/ # ls -l /sys/class/net/usb0\n  lrwxrwxrwx ... /sys/class/net/usb0 ->\n  /sys/devices/platform/.../gadget.0/net/usb0\n  console:/ # ls -l /sys/devices/platform/.../gadget.0/net/usb0\n  ls: .../gadget.0/net/usb0: No such file or directory\n\nUse device_move() to reparent the net_device between the gadget device\ntree and /sys/devices/virtual across bind and unbind cycles. During the\nfinal unbind, calling device_move(NULL) moves the net_device to the\nvirtual device tree before the gadget device is destroyed. On rebinding,\ndevice_move() reparents the device back under the new gadget, ensuring\nproper sysfs topology and power management ordering.\n\nTo maintain compatibility with legacy composite drivers (e.g., multi.c),\nthe borrowed_net flag is used to indicate whether the network device is\nshared and pre-registered during the legacy driver's bind phase.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/18ada801899f2b13ef0ceff42427ad980a41e619","https://git.kernel.org/stable/c/1ef251aa63972fe6c0f107f5abd139b7d0f7987a","https://git.kernel.org/stable/c/6045ea5ca6e3fa13f8a9fafb1c535c86e124c14d","https://git.kernel.org/stable/c/9701a98f4459b52558f683b6b12a6feb6f17b255","https://git.kernel.org/stable/c/e367599529dc42578545a7f85fde517b35b3cda7"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2026-31722","score":0.00155,"percentile":0.04563,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}