Provide references for CVE-2021-31663.
Where can I find more information about CVE-2021-31663?
References are available at: https://github.com/RIOT-OS/RIOT/issues/15927, https://github.com/RIOT-OS/RIOT/pull/15929, https://github.com/RIOT-OS/RIOT/commit/bc59d60be60dfc0a05def57d74985371e4f22d79.