From what I've read online, it should be possible to estimate the uptime of your machine with TCP timestamps.
I'm not sure why this would be a problem, maybe an attacker can see that you haven't rebooted to install a kernel update?
I'm not sure why this would be a problem, maybe an attacker can see that you haven't rebooted to install a kernel update?
Uptime can be used as a source of "randomness" in PRNGs, so knowing that bit of information could clearly be beneficial to an attacker.