CVE-2024-56739 is a vulnerability in the Linux kernel's RTC (Real-Time Clock) subsystem where a failure to check the success of the __rtc_read_time call in rtc_timer_do_work() can lead to uninitialized or invalid time data. This may cause the kernel to compute an excessively large time value, potentially triggering continuous expiration of periodic timers and resulting in a kernel softlockup.