Provide references for CVE-2021-30883.
Where can I find more information about CVE-2021-30883?
References are available at: https://support.apple.com/en-us/HT212869, https://support.apple.com/en-us/HT212872, https://support.apple.com/en-us/HT212846, https://support.apple.com/en-us/HT212868, https://support.apple.com/en-us/HT212874, https://support.apple.com/en-us/HT212876.