Provide references for CVE-2021-3493.
Where can I find more information about CVE-2021-3493?
References are available at: https://ubuntu.com/security/notices/USN-4917-1, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7c03e2cda4a584cadc398e8f6641ca9988a39d52, https://www.openwall.com/lists/oss-security/2021/04/16/1, http://packetstormsecurity.com/files/162434/Kernel-Live-Patch-Security-Notice-LSN-0076-1.html, http://packetstormsecurity.com/files/162866/Ubuntu-OverlayFS-Local-Privilege-Escalation.html, http://packetstormsecurity.com/files/165151/Ubuntu-Overlayfs-Local-Privilege-Escalation.html.