Android 4.4.2 KitKat has not arrived on any Xperia handset yet officially but it is expected Sony will unveil the new Xperia KitKat UI at MWC 2014 press conference where it may launch Xperia Z2 Tablet and Sony D6503 hopefully as Xperia Z2. We have seen official CyanogenMod 11 for Xperia Z1, Z Ultra and Z Ultra GPE already and some unofficial builds also for other Xperia smartphones. Just now from XDA dev # root, Xperia L unofficial CyanogenMod 11 Android 4.4.2 KitKat ROM is available for installing.
Xperia L unofficial CyanogenMod 11 Android 4.4.2 KitKat ROM is in alpha stage now and not much stable for full functioning, as per developer GPS, Bluetooth are not working and internal storage shows only 2 GB capacity. If you are still interested in trying it on your Xperia L, check below link.
To install Xperia L unofficial CyanogenMod 11 Android 4.4.2 KitKat ROM, you need to have unlocked bootloader.
Download Xperia L Unofficial CM11 ROM
Download the below mentioned CM11 ROM package and follow the flashing instructions given from dev.
At present above ROM is in alpha 1 stage so you can wait for a bit later update so that it gets stable.
Do let us know if you are keen to try above ROM, drop your comments below, like it ?