CVE-2026-68233

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> drm/vc4: Shut down BO cache timer before teardown<br /> <br /> The BO cache timer callback schedules time_work, and time_work can rearm<br /> the timer through vc4_bo_cache_free_old().<br /> <br /> vc4_bo_cache_destroy() deletes the timer and then cancels the work, which<br /> does not break that cycle: the work being cancelled can rearm the timer,<br /> and the timer then queues work again after teardown.<br /> <br /> Use timer_shutdown_sync() instead, so the timer cannot be rearmed and the<br /> cycle ends with cancel_work_sync().