Medium 5.5Published May 1, 2026

CVE-2026-31724usb: gadget: f_eem: Fix net_device lifecycle with device_move

Updated under an hour ago (Oct 28, 2026, 9:10 AM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_eem: Fix net_device lifecycle with device_move The net_device is allocated during function instance creation and registered during the bind phase with the gadget device as its sysfs parent. When the function unbinds, the parent device is destroyed, but the net_device survives, resulting in dangling sysfs symlinks: console:/ # ls -l /sys/class/net/usb0 lrwxrwxrwx ... /sys/class/net/usb0 -> /sys/devices/platform/.../gadget.0/net/usb0 console:/ # ls -l /sys/devices/platform/.../gadget.0/net/usb0 ls: .../gadget.0/net/usb0: No such file or directory Use device_move() to reparent the net_device between the gadget device tree and /sys/devices/virtual across bind and unbind cycles. During the final unbind, calling device_move(NULL) moves the net_device to the virtual device tree before the gadget device is destroyed. On rebinding, device_move() reparents the device back under the new gadget, ensuring proper sysfs topology and power management ordering. To maintain compatibility with legacy composite drivers (e.g., multi.c), the bound flag is used to indicate whether the network device is shared and pre-registered during the legacy driver's bind phase.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from b29002a157940752dfed2c488b2011f63f007d71 before b1d854462510f7b7c504bfd5f8ec19c0737ed5e4; from b29002a157940752dfed2c488b2011f63f007d71 before a6b8bce01a30a8c05c034bbc36c34845d65d644f; from b29002a157940752dfed2c488b2011f63f007d71 before 4ccdccff8febc5456aff684627f9a4c5c83b9346; from b29002a157940752dfed2c488b2011f63f007d71 before 14730506b9e2a09d10c963a57a72ed528482fc15; from b29002a157940752dfed2c488b2011f63f007d71 before d9270c9a8118c1535409db926ac1e2545dc97b81	CNA record
linux linux_kernel linux:linux_kernel	from 3.11.1 before 6.12.81; from 6.13 before 6.18.22; from 6.19 before 6.19.12; 7.0; 7.0; 7.0; 7.0; 7.0; and 1 more ranges	NVD

References

References

https://git.kernel.org/stable/c/b1d854462510f7b7c504bfd5f8ec19c0737ed5e4
https://git.kernel.org/stable/c/a6b8bce01a30a8c05c034bbc36c34845d65d644f	patch
https://git.kernel.org/stable/c/4ccdccff8febc5456aff684627f9a4c5c83b9346	patch
https://git.kernel.org/stable/c/14730506b9e2a09d10c963a57a72ed528482fc15	patch
https://git.kernel.org/stable/c/d9270c9a8118c1535409db926ac1e2545dc97b81	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.