The Security update for October was recently released for some Samsung handsets, including the widely popular Galaxy S8. However, several Samsung smartphones are yet to receive them.
As per reports from website GIZBOT, Samsung has rolled out the security update for Galaxy Note 8 units with model numbers SM-N9508 and SM-N9500. Samsung hasn't released any official timeline for the new update to be rolled out to other markets; however, it's just a matter of time that the other markets will start receiving it.
The monthly Android security updates are pushed by Google to keep devices secure and up to date. The monthly patches offer protection against latest security threats that can make devices vulnerable to security malfunction.