CVE-2025-71073

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

Input: lkkbd - disable pending work before freeing device

lkkbdinterrupt() schedules lk->tq via schedulework(), and the work handler lkkbdreinit() dereferences the lkkbd structure and its serio/inputdev fields.

lkkbddisconnect() and error paths in lkkbdconnect() free the lkkbd structure without preventing the reinit work from being queued again until serio_close() returns. This can allow the work handler to run after the structure has been freed, leading to a potential use-after-free.

Use disableworksync() instead of cancelworksync() to ensure the reinit work cannot be re-queued, and call it both in lkkbddisconnect() and in lkkbdconnect() error paths after serio_open().