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

Xcode 26.1
Released November 3, 2025

GNU
Available for: macOS Sequoia 15.6 and later
Impact: Processing a maliciously crafted file may lead to heap corruption
Description: An out-of-bounds write issue was addressed with improved input validation.
CVE-2025-43505: Nathaniel Oh (@calysteon)

lldb
Available for: macOS Sequoia 15.6 and later
Impact: A user in a privileged network position may be able to cause a denial-of-service
Description: A buffer overflow was addressed with improved bounds checking.
CVE-2025-43504: Nathaniel Oh (@calysteon)