Provide references for CVE-2021-30926.
Where can I find more information about CVE-2021-30926?
References are available at: https://support.apple.com/kb/HT212871, https://support.apple.com/kb/HT212872, https://support.apple.com/kb/HT212868, https://support.apple.com/en-us/HT212975, https://support.apple.com/en-us/HT212976, https://support.apple.com/en-us/HT212978, https://support.apple.com/en-us/HT212980.