In the Linux kernel, the following vulnerability has been resolved: rtc: check if _rtcreadtime was successful in rtctimerdowork() If the _rtcreadtime call fails,, the struct rtctime tm; may contain uninitialized data, or an illegal date/time read from the RTC hardware. When calling rtctmtoktime later, the result may be a very large value (possibly KTIMEMAX). If there are periodic timers in rtc->timerqueue, they will continually expire, may causing kernel softlockup.