Oneplus One users reportedly getting the July Security Update. The OTA Update weighs 277MB in size which comes with the fixes to some critical issues on the Device. However, there are no new features in this update for OnePlus One.
You can check it manually if you did not get the OTA Notification yet on your device. Go to Settings>>About Phone>>Software update.
Moreover, earlier today Samsung releases the July Security Patch with fixes to two main issues i.e. Samsung Professional Audio SDK and the IPC socket. But the Update don’t appear to be hitting flagship devices as-of-yet, so we’ll have to wait a bit before the patches start hitting handsets.