Estimate for the total number of exploitable bugs in the current stable kernel?

[Georgi Guninski]

What is an estimate for the total number of exploitable bugs in the
current stable linux kernel? (Jul 24 07:59:50 UTC 2017) Total
includes private and unknown bugs too.

Also does the number decrease, increase or change in other way over
time?

If the answer is rather hard or well, ``undecidable'' what about only
remote code execution bugs?

Similar question about bugs in a linux distro was asked on
oss-security and cypherpunks lists and some suggested "we can't tell".