The September OS X 10.11.6 update includes the following fixes for the OS.
Kernel
- Available for: OS X Yosemite v10.10.5 and OS X El Capitan v10.11.6
- Impact: An application may be able to disclose kernel memory
- Description: A validation issue was addressed through improved input sanitization.
- CVE-2016-4655: Citizen Lab and Lookout
Kernel
- Available for: OS X Yosemite v10.10.5 and OS X El Capitan v10.11.6
- Impact: An application may be able to execute arbitrary code with kernel privileges
- Description: A memory corruption issue was addressed through improved memory handling.
- CVE-2016-4656: Citizen Lab and Lookout
Apple also includes fixes for Safari in this security fix. Essentially these updates block a loophole that could allow someone to spy on your computer. It was previously used to spy on journalists and dissidents.WebKit
- Available for: OS X Mavericks v10.9.5, OS X Yosemite v10.10.5, and OS X El Capitan v10.11.6
- Impact: Visiting a maliciously crafted website may lead to arbitrary code execution
- Description: A memory corruption issue was addressed through improved memory handling.
- CVE-2016-4654: Citizen Lab and Lookout
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