CISA description
Apple iOS, iPadOS, and watchOS Mail contains an out-of-bounds write vulnerability which may allow memory modification or application termination when processing a maliciously crafted mail message.
CVE-2020-9818
Apple · iOS, iPadOS, and watchOS
Apple iOS, iPadOS, and watchOS Out-of-Bounds Write Vulnerability
Required action
Apply updates per vendor instructions.
Notes & references
Where this lands in 800-53
Vulnerability data triggers these controls during assessment and continuous monitoring.