CVE-2026-97986

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

virtio input: stop callbacks before unregistering input device

virtinput remove() unregisters the input device before resetting the virtio device. virtinput recv events() drops vi->lock around input event(), so clearing vi->ready does not stop a callback that passed the entry check. It can still use vi->idev, requeue buffers and kick the queue.

Reset first, as virtinput freeze() already does. With the preceding core change, reset waits for callbacks before input unregister device() can free vi->idev. Recheck vi->ready after taking the lock again: keep draining completed events so an input packet is not truncated, but stop requeueing buffers and kicking the queue.

With evdev attached, input unregister handle() currently waits for an RCU grace period, which also waits out IRQ callbacks. This masks the lifetime bug on PCI and MMIO, but does not protect sleepable callbacks on other transports.