CVE-2026-90020 — USB: gadget: fix NULL pointer dereference in gadget_dev_ioctl()

Affected: Linux

In the Linux kernel, the following vulnerability has been resolved:

USB: gadget: fix NULL pointer dereference in gadget_dev_ioctl()

gadget_dev_ioctl() reads dev->gadget before acquiring dev->lock, but dev->state is checked after acquiring the lock. Therefore a concurrent bind can change the device state between these operations, which can leave ioctl with a stale NULL gadget pointer and causing a NULL pointer dereference at gadget->ops->ioctl.

Read dev->gadget while holding dev->lock so that the gadget pointer and device state are sampled consistently.

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CVE-2026-90020 — USB: gadget: fix NULL pointer dereference in gadget_dev_ioctl()