Apple Security Advisory 2015-10-21-4 - OS X El Capitan 10.11.1 and Security Update 2015-007 are now available and address memory corruption, code execution, and various other vulnerabilities.
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Apple Security Advisory 2015-10-21-2 - watchOS 2.0.1 is now available and addresses arbitrary code execution, heap buffer overflow, and various other vulnerabilities.
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Apple Security Advisory 2015-10-21-1 - iOS 9.1 is now available and addresses arbitrary code execution, cookies being overwritten, heap based buffer overflow, and various other vulnerabilities.
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