An out-of-bounds write issue was addressed with improved bounds checking.

MacOS Sequoia 15.6.1
Released August 20, 2025

ImageIO
Available for: macOS Sequoia

Impact: Processing a malicious image file may result in memory corruption. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals.

Description: An out-of-bounds write issue was addressed with improved bounds checking.

CVE-2025-43300: Apple