A heap buffer overflow vulnerability was fixed by improving bounds checking in Apple operating systems including iOS, iPadOS, macOS Golden Gate, visionOS, and watchOS. The flaw could cause unexpected application termination when processing a maliciously crafted file. The issue is resolved in versions iOS 26.7 and later, iPadOS 26.7 and later, macOS Golden Gate 27 and later, visionOS 27 and later, and watchOS 27 and later.