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APPLE-SA-2018-02-19-4 watchOS 4.2.3

watchOS 4.2.3 is now available and addresses the following:

CoreText
Available for: All Apple Watch models
Impact: Processing a maliciously crafted string may lead to heap
corruption
Description: A memory corruption issue was addressed through improved
input validation.
CVE-2018-4124: an anonymous researcher

Installation note:

Instructions on how to update your Apple Watch software are
available at https://support.apple.com/kb/HT204641

To check the version on your Apple Watch, open the Apple Watch app
on your iPhone and select "My Watch > General > About".

Alternatively, on your watch, select "My Watch > General > About".

Information will also be posted to the Apple Security Updates
web site: https://support.apple.com/kb/HT201222

This message is signed with Apple's Product Security PGP key,
and details are available at:
https://www.apple.com/support/security/pgp/
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