Android 5.0.1 has been leaked for curved edge screen phablet Samsung Galaxy Note Edge. An XDA member has shared the PIT, Bootloader, Modem, CSC and AP files from the test build for Galaxy Note Edge. The test build will work on N915F and on N915FY, which is the international European variant (will make your device recognizable as N915F). These files can be flashed using Odin tool on the Note Edge.
Senior XDA member, Beukhof1 has flashed this test firmware with build number N915FXXU1BOA2 and confirms the firmware is really smooth, without any issues. It does not trip the Knox counter as well. The member has built an Odin flashable zip file, which contains PIT, Bootloader, Modem, CSC and APfiles.
If you want to enjoy the N915FXXU1BOA2 build featuring Android 5.0.1 Lollipop on your Galaxy Note Edge, check out the following installation guide. You’ll also need to backup your device, one user had success with flashing the ROM without a full wipe, but there are no guarantees. The ROM can be flashed with Odin 3.09 and you can also throw in CWM and root (with SuperSU).
Also note that the firmware does not trip Knox security feature and you can always downgrade back to Android 4.4.4.
Important bug to note is that you have to manually set the minimum CPU frequency to 300MHz using some third party software.