CVE-2021-47209

The CVE-2021-47209 issue affects the Linux kernel’s scheduler, specifically sched/fair with the cfs_rq handling. A use-after-free of a cfs_rq occurs when a dying task group is unlinked or partially unlinked while a concurrent timer/race (tg_unthrottle_up via sched_cfs_period_timer) can re-add cfs...