This message is a reminder that Fedora 23 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
and issuing updates for Fedora 23. It is Fedora's policy to close all
bug reports from releases that are no longer maintained. At that time
this bug will be closed as EOL if it remains open with a Fedora  'version'
of '23'.

Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version' 
to a later Fedora version.

Thank you for reporting this issue and we are sorry that we were not 
able to fix it before Fedora 23 is end of life. If you would still like 
to see this bug fixed and are able to reproduce it against a later version 
of Fedora, you are encouraged  change the 'version' to a later Fedora 
version prior this bug is closed as described in the policy above.

Although we aim to fix as many bugs as possible during every release's 
lifetime, sometimes those efforts are overtaken by events. Often a 
more recent Fedora release includes newer upstream software that fixes 
bugs or makes them obsolete.

Same problem in Fedora 25.

dec 04 20:38:37 bender audit[1]: AVC avc:  denied  { read write } for  pid=1 comm="systemd" name="ttyUSB0" dev="devtmpfs" ino=2626 scontext=system_u:system_r:init_t:s0 tcontext=system_u:object_r:usbtty_device_t:s0 tclass=chr_file permissive=0
dec 04 20:38:37 bender audit[1]: AVC avc:  denied  { read write } for  pid=1 comm="systemd" name="ttyUSB0" dev="devtmpfs" ino=2626 scontext=system_u:system_r:init_t:s0 tcontext=system_u:object_r:usbtty_device_t:s0 tclass=chr_file permissive=0
dec 04 20:38:37 bender audit[1]: SERVICE_STOP pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=serial-getty@ttyUSB0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
dec 04 20:38:37 bender systemd[1]: serial-getty: Service hold-off time over, scheduling restart.
dec 04 20:38:37 bender audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=serial-getty@ttyUSB0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
dec 04 20:38:37 bender audit[1]: SERVICE_STOP pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=serial-getty@ttyUSB0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
dec 04 20:38:37 bender systemd[1]: Stopped Serial Getty on ttyUSB0.
dec 04 20:38:37 bender audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=serial-getty@ttyUSB0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
dec 04 20:38:37 bender systemd[1]: Started Serial Getty on ttyUSB0.
dec 04 20:38:37 bender audit[5788]: AVC avc:  denied  { read write } for  pid=5788 comm="(agetty)" name="ttyUSB0" dev="devtmpfs" ino=2626 scontext=system_u:system_r:init_t:s0 tcontext=system_u:object_r:usbtty_device_t:s0 tclass=chr_file permissive=0
dec 04 20:38:37 bender audit[5788]: AVC avc:  denied  { read write } for  pid=5788 comm="(agetty)" name="ttyUSB0" dev="devtmpfs" ino=2626 scontext=system_u:system_r:init_t:s0 tcontext=system_u:object_r:usbtty_device_t:s0 tclass=chr_file permissive=0
dec 04 20:38:37 bender audit[5788]: AVC avc:  denied  { open } for  pid=5788 comm="agetty" path="/dev/ttyUSB0" dev="devtmpfs" ino=2626 scontext=system_u:system_r:getty_t:s0-s0:c0.c1023 tcontext=system_u:object_r:usbtty_device_t:s0 tclass=chr_file permissive=0

This message is a reminder that Fedora 25 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
and issuing updates for Fedora 25. It is Fedora's policy to close all
bug reports from releases that are no longer maintained. At that time
this bug will be closed as EOL if it remains open with a Fedora  'version'
of '25'.

Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version'
to a later Fedora version.

Thank you for reporting this issue and we are sorry that we were not
able to fix it before Fedora 25 is end of life. If you would still like
to see this bug fixed and are able to reproduce it against a later version
of Fedora, you are encouraged  change the 'version' to a later Fedora
version prior this bug is closed as described in the policy above.

Although we aim to fix as many bugs as possible during every release's
lifetime, sometimes those efforts are overtaken by events. Often a
more recent Fedora release includes newer upstream software that fixes
bugs or makes them obsolete.

Fedora 25 changed to end-of-life (EOL) status on 2017-12-12. Fedora 25 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of
Fedora please feel free to reopen this bug against that version. If you
are unable to reopen this bug, please file a new report against the
current release. If you experience problems, please add a comment to this
bug.

Thank you for reporting this bug and we are sorry it could not be fixed.

Same problem still occurring in Fedora 29:

Mar 19 22:01:21 rex audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=serial-getty@ttyUSB0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Mar 19 22:01:22 rex audit[1771]: AVC avc:  denied  { setattr } for  pid=1771 comm="agetty" name="ttyUSB0" dev="devtmpfs" ino=24592 scontext=system_u:system_r:getty_t:s0-s0:c0.c1023 tcontext=system_u:object_r:usbtty_device_t:s0 tclass=chr_file permissive=0
Mar 19 22:01:22 rex agetty[1771]: /dev/ttyUSB0: Permission denied