> It is not just about python3.6 but I can also see something similar with old
> kernel and python35 in latest rawhide userspace
> https://bugzilla.redhat.com/show_bug.cgi?id=1410187
BTW the explanation is that the latest update of glibc in rawhide provides 
functions getentropy and getrandom

objdump -T /lib64/libc.so.6 | grep GLIBC_2.25
000000000003c6f0 g    DF .text  000000000000008c  GLIBC_2.25  getentropy
0000000000000000 g    DO *ABS*  0000000000000000  GLIBC_2.25  GLIBC_2.25
000000000003c9a0 g    DF .text  000000000000020f  GLIBC_2.25  strfromd
000000000003c780 g    DF .text  000000000000021f  GLIBC_2.25  strfromf
000000000003cbb0 g    DF .text  000000000000021f  GLIBC_2.25  strfroml
00000000000a3a60 g    DF .text  0000000000000013  GLIBC_2.25  explicit_bzero
000000000011f1a0 g    DF .text  0000000000000025  GLIBC_2.25  
__explicit_bzero_chk
000000000003c650 g    DF .text  0000000000000099  GLIBC_2.25  getrandom

and the latest python3 nad python35 packaeges uses it
sh# rpm -q python3 python35
python3-3.6.0-1.fc26.x86_64
python35-3.5.2-5.fc26.x86_64

sh# objdump -T /usr/lib64/libpython3.5m.so | grep GLIBC_2.25
0000000000000000      DF *UND*  0000000000000000  GLIBC_2.25  getentropy

sh# objdump -T /usr/lib64/libpython3.6m.so | grep GLIBC_2.25
0000000000000000      DF *UND*  0000000000000000  GLIBC_2.25  getentropy


older version of python3 (3.5 at that time) didn't use it because it was 
compiled against older version of glibc

sh# objdump -T /usr/lib64/libpython3.so | grep GLIBC_2.25
sh# objdump -T /usr/lib64/libpython3.5m.so.1.0 | grep GLIBC_2.25
sh# rpm -q python3
python3-3.5.2-7.fc26.x86_64
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