Seemingly out of the blue, Google has posted factory images of Android 4.4.4 for the Google Nexus 4, Nexus 5, Nexus 10, and Wi-Fi versions of both the 2012 and 2013 versions of the Nexus 7 to its website. All files bear build number KTU84P. The move comes just over two weeks after Google began rolling out the Android 4.4.3 update, suggesting that a few more bugs needed to be addressed after the latest update.
The speed at which the update followed the Android 4.4.3 update suggests that it is focused on security fixes. This appears to be confirmed by Googler Sascha Prüter who indicates that it fixes security issue CVE-2014-0224 which affects OpenSSL. He adds that it also addresses “other (not quite as severe) security issues” but provides no further details. A Sprint Wireless changelog confirms that it is security related but sheds no further information.
In comparison, Android 4.4.3 was the topic of rumours for about three months before it was finally released.
We can expect OTA updates to begin rolling out shortly. As always, expect them to hit Nexus devices first followed quickly by Google Play edition and Motorola ones if other recent updates are any indication.