Race condition in fs/timerfd.c in the Linux kernel before 4.10.15 allows local users to gain privileges or cause a denial of service (list corruption or use-after-free) via simultaneous file-descriptor operations that leverage improper might_cancel queueing.
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1e38da300e1e395a15048b0af1e5305bd91402f6
www.debian.org/security/2017/dsa-3981
www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.10.15
www.securityfocus.com/bid/100215
access.redhat.com/errata/RHSA-2018:3083
access.redhat.com/errata/RHSA-2018:3096
access.redhat.com/errata/RHSA-2019:4057
access.redhat.com/errata/RHSA-2019:4058
access.redhat.com/errata/RHSA-2020:0036
bugzilla.redhat.com/show_bug.cgi?id=1481136
github.com/torvalds/linux/commit/1e38da300e1e395a15048b0af1e5305bd91402f6
source.android.com/security/bulletin/2017-08-01
www.exploit-db.com/exploits/43345/