Apple iOS, iPadOS, macOS, tvOS, and watchOS contain an unspecified vulnerability that allows for code execution when processing a font file.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
https://support.apple.com/en-us/HT213599, https://support.apple.com/en-us/HT213601, https://support.apple.com/en-us/HT213605, https://support.apple.com/en-us/HT213606, https://support.apple.com/en-us/HT213842, https://support.apple.com/en-us/HT213844, https://support.apple.com/en-us/HT213845