Provide references for CVE-2018-18021.
Where can I find more information about CVE-2018-18021?
References are available at: https://usn.ubuntu.com/3821-1/, https://github.com/torvalds/linux/commit/2a3f93459d689d990b3ecfbe782fec89b97d3279, https://www.openwall.com/lists/oss-security/2018/10/02/2, https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.12, https://access.redhat.com/errata/RHSA-2018:3656, https://github.com/torvalds/linux/commit/d26c25a9d19b5976b319af528886f89cf455692d, http://www.securityfocus.com/bid/105550, https://usn.ubuntu.com/3821-2/, http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2a3f93459d689d990b3ecfbe782fec89b97d3279, http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d26c25a9d19b5976b319af528886f89cf455692d, https://www.debian.org/security/2018/dsa-4313, https://usn.ubuntu.com/3931-1/, https://usn.ubuntu.com/3931-2/.