Aaro Koskinen

A vulnerability exists in the Linux kernel where accessing the /sys/devices/system/clocksource/clocksource0/current clocksource endpoint on non-GENERIC TIME systems (GENERIC TIME=n) results in an OOPS.

The issue allows local users to gain privileges or cause a denial of service (use-after-free) by leveraging improper access to a certain error field in the ext4 journal stop function.