Medium 5.5Published May 1, 2026

CVE-2026-31725usb: gadget: f_ecm: Fix net_device lifecycle with device_move

Updated under an hour ago (Oct 27, 2026, 6:40 PM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_ecm: 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 fee562a6450b7806f1fbbe1469a67b5395b5c10a before fdc3aa4c23d3e0ed781ca0e10213c645e445cc03; from fee562a6450b7806f1fbbe1469a67b5395b5c10a before 5eaeac22240d965d24c3bd0c54ded64efd8f6ca1; from fee562a6450b7806f1fbbe1469a67b5395b5c10a before 4e34f3f491fd731809b57ddb5329ec763bd39553; from fee562a6450b7806f1fbbe1469a67b5395b5c10a before 9b1e5589593293c78a2ab8bb118a41e2271a2af8; from fee562a6450b7806f1fbbe1469a67b5395b5c10a before b2cc4fae67a51f60d81d6af2678696accb07c656	CNA record
linux linux_kernel linux:linux_kernel	from 3.11 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/fdc3aa4c23d3e0ed781ca0e10213c645e445cc03
https://git.kernel.org/stable/c/5eaeac22240d965d24c3bd0c54ded64efd8f6ca1	patch
https://git.kernel.org/stable/c/4e34f3f491fd731809b57ddb5329ec763bd39553	patch
https://git.kernel.org/stable/c/9b1e5589593293c78a2ab8bb118a41e2271a2af8	patch
https://git.kernel.org/stable/c/b2cc4fae67a51f60d81d6af2678696accb07c656	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.