About Apple security updates
For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security updates page.
For more information about security, see the Apple Product Security page. You can encrypt communications with Apple using the Apple Product Security PGP Key.
Apple security documents reference vulnerabilities by CVE-ID when possible.
watchOS 4.2.2
Released January 23, 2018
Audio
Available for: All Apple Watch models
Impact: Processing a maliciously crafted audio file may lead to arbitrary code execution
Description: A memory corruption issue was addressed with improved input validation.
CVE-2018-4094: Mingi Cho, Seoyoung Kim, Young-Ho Lee, MinSik Shin and Taekyoung Kwon of the Information Security Lab, Yonsei University
Entry added November 16, 2018
Core Bluetooth
Available for: All Apple Watch models
Impact: An application may be able to execute arbitrary code with system privileges
Description: A memory corruption issue was addressed with improved memory handling.
CVE-2018-4087: Rani Idan (@raniXCH) of Zimperium zLabs Team
CVE-2018-4095: Rani Idan (@raniXCH) of Zimperium zLabs Team
Graphics Driver
Available for: All Apple Watch models
Impact: An application may be able to execute arbitrary code with kernel privileges
Description: A memory corruption issue was addressed with improved memory handling.
CVE-2018-4109: Adam Donenfeld (@doadam) of the Zimperium zLabs Team
Entry added February 8, 2018
Kernel
Available for: All Apple Watch models
Impact: An application may be able to read restricted memory
Description: A memory initialization issue was addressed with improved memory handling.
CVE-2018-4090: Jann Horn of Google Project Zero
Entry updated November 16, 2018
Kernel
Available for: All Apple Watch models
Impact: An application may be able to read restricted memory
Description: A race condition was addressed with improved locking.
CVE-2018-4092: Stefan Esser of Antid0te UG
Entry updated November 16, 2018
Kernel
Available for: All Apple Watch models
Impact: A malicious application may be able to execute arbitrary code with kernel privileges
Description: A memory corruption issue was addressed with improved input validation.
CVE-2018-4082: Russ Cox of Google
Entry updated November 16, 2018
Kernel
Available for: All Apple Watch models
Impact: An application may be able to read restricted memory
Description: A validation issue was addressed with improved input sanitization.
CVE-2018-4093: Jann Horn of Google Project Zero
Kernel
Available for: All Apple Watch models
Impact: An application may be able to execute arbitrary code with kernel privileges
Description: A memory corruption issue was addressed with improved memory handling.
CVE-2018-4189: an anonymous researcher
Entry added May 2, 2018
LinkPresentation
Available for: All Apple Watch models
Impact: Processing a maliciously crafted text message may lead to application denial of service
Description: A resource exhaustion issue was addressed with improved input validation.
CVE-2018-4100: Abraham Masri @cheesecakeufo
Entry updated November 16, 2018
QuartzCore
Available for: All Apple Watch models
Impact: Processing maliciously crafted web content may lead to arbitrary code execution
Description: A memory corruption issue existed in the processing of web content. This issue was addressed with improved input validation.
CVE-2018-4085: Ret2 Systems Inc. working with Trend Micro's Zero Day Initiative
Entry updated November 16, 2018
Security
Available for: All Apple Watch models
Impact: A certificate may have name constraints applied incorrectly
Description: A certificate evaluation issue existed in the handling of name constraints. This issue was addressed with improved trust evaluation of certificates.
CVE-2018-4086: Ian Haken of Netflix
Entry updated November 16, 2018
WebKit
Available for: All Apple Watch models
Impact: Processing maliciously crafted web content may lead to arbitrary code execution
Description: Multiple memory corruption issues were addressed with improved memory handling.
CVE-2018-4088: Jeonghoon Shin of Theori
CVE-2018-4096: found by OSS-Fuzz
WebKit
Available for: All Apple Watch models
Impact: Processing maliciously crafted web content may lead to arbitrary code execution
Description: Multiple memory corruption issues were addressed with improved memory handling.
CVE-2018-4147: found by OSS-Fuzz
Entry added October 1, 2018