Here' good news for Xperia Z2 series users. A new firmware with the build number 23.4.A.1.200 has been certified over PTCRB for Xperia Z2 Series and Xperia Z3 Tablet compact. This update looks like a big update than the usual bug fixes and performance enhancements as it moves from 23.4.A.0.XXX to 23.4.A.1.XX. We can expect this should be the fix for the stagefright exploit.
For now the update has been certified for Xperia Z2 (D6503 only), Xperia Z2 Tablet (SGP521 only) and Xperia Z3 Tablet Compact (SGP641 only). In the meantime we can expact the same update will certify for the Xperia Z3 Series.