Siemens SCALANCE and RUGGEDCOM Devices Improper Input Validation (CVE-2024-56739)

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 ar...