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APPLE-SA-2021-01-26-1 iOS 14.4 and iPadOS 14.4

iOS 14.4 and iPadOS 14.4 addresses the following issues. Information
about the security content is also available at
https://support.apple.com/HT212146.

Kernel
Available for: iPhone 6s and later, iPad Air 2 and later, iPad mini 4
and later, and iPod touch (7th generation)
Impact: A malicious application may be able to elevate privileges.
Apple is aware of a report that this issue may have been actively
exploited.
Description: A race condition was addressed with improved locking.
CVE-2021-1782: an anonymous researcher

WebKit
Available for: iPhone 6s and later, iPad Air 2 and later, iPad mini 4
and later, and iPod touch (7th generation)
Impact: A remote attacker may be able to cause arbitrary code
execution. Apple is aware of a report that this issue may have been
actively exploited.
Description: A logic issue was addressed with improved restrictions.
CVE-2021-1871: an anonymous researcher
CVE-2021-1870: an anonymous researcher

Additional details available soon.

Installation note:

This update is available through iTunes and Software Update on your
iOS device, and will not appear in your computer's Software Update
application, or in the Apple Downloads site. Make sure you have an
Internet connection and have installed the latest version of iTunes
from https://www.apple.com/itunes/

iTunes and Software Update on the device will automatically check
Apple's update server on its weekly schedule. When an update is
detected, it is downloaded and the option to be installed is
presented to the user when the iOS device is docked. We recommend
applying the update immediately if possible. Selecting Don't Install
will present the option the next time you connect your iOS device.

The automatic update process may take up to a week depending on the
day that iTunes or the device checks for updates. You may manually
obtain the update via the Check for Updates button within iTunes, or
the Software Update on your device.

To check that the iPhone, iPod touch, or iPad has been updated:

* Navigate to Settings
* Select General
* Select About. The version after applying this update
will be "iOS 14.4 and iPadOS 14.4".

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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