CVE-2026-46257

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> clocksource/drivers/timer-sp804: Fix an Oops when read_current_timer is called on ARM32 platforms where the SP804 is not registered as the sched_clock.<br /> <br /> On SP804, the delay timer shares the same clkevt instance with<br /> sched_clock. On some platforms, when<br /> sp804_clocksource_and_sched_clock_init is called with use_sched_clock<br /> not set to 1, sched_clkevt is not properly initialized. However,<br /> sp804_register_delay_timer is invoked unconditionally, and<br /> read_current_timer() subsequently calls sp804_read on an uninitialized<br /> sched_clkevt, leading to a kernel Oops when accessing<br /> sched_clkevt-&gt;value.<br /> <br /> Declare a dedicated clkevt instance exclusively for delay timer,<br /> instead of sharing the same clkevt with sched_clock. This ensures<br /> that read_current_timer continues to work correctly regardless of<br /> whether SP804 is selected as the sched_clock.