CVE-2025-43349 is an out-of-bounds write vulnerability that was addressed by improved input validation in several Apple operating systems. The flaw could be triggered by processing a maliciously crafted video file, potentially causing unexpected application termination. The issue is fixed in tvOS 26, macOS Sonoma 14.8, macOS Sequoia 15.7, iOS 18.7, iPadOS 18.7, visionOS 26, watchOS 26, macOS Tahoe 26, iOS 26, and iPadOS 26. The vulnerability has a low CVSS score of 2.8 and does not impact confidentiality or integrity, only availability. No known exploits are reported in the wild.