A use after free issue was addressed with improved memory management. This issue is fixed in visionOS 2.3, iOS 18.3 and iPadOS 18.3, macOS Sequoia 15.3, watchOS 11.3, tvOS 18.3. A malicious application may be able to elevate privileges. Apple is aware of a report that this issue may have been actively exploited against versions of iOS before iOS 17.2.
https://www.securityweek.com/apple-patches-first-exploited-ios-zero-day-of-2025/
https://thehackernews.com/2025/01/apple-patches-actively-exploited-zero.html
https://support.apple.com/en-us/122073
https://support.apple.com/en-us/122072
https://support.apple.com/en-us/122071