CVE-2026-31721

kernel: usb: gadget: f_hid: move list and spinlock inits from bind to alloc

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Severity

Unknown

Red Hat Product Security

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CVSS

Review impact separately from score.

Published · May 1, 2026

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel's USB Human Interface Device (HID) gadget driver (f_hid). When a USB gadget is unbound and then rebound while file descriptors are still actively using its wait queues, the driver can re-initialize these queues while they still contain items. This can lead to list corruption, potentially causing system instability or a denial of service.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CWE-821 · Incorrect Synchronization