Oracle XE 11g – Service Not Mounting Database

A few days ago I did a system upgrade to fedora 27 and since then the oracle service doesn't properly start the database, I mean after running:

sudo service oracle-xe start

the database still down. but if I login as the oracle user and then execute the contents of startdb.sql:

connect / as sysdba
startup
exit

everything works as usual. I think the problem is caused by some misconfiguration, but I don't know where to look.

Running systemctl status oracle-xe only shows that the database is not active:

LSNRCTL for Linux: Version 11.2.0.2.0 - Production on 21-JAN-2018 16:32:44

Copyright (c) 1991, 2011, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
TNS-12541: TNS:no listener
 TNS-12560: TNS:protocol adapter error
  TNS-00511: No listener
   Linux Error: 111: Connection refused
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost.localdomain)(PORT=1521)))
TNS-12541: TNS:no listener
 TNS-12560: TNS:protocol adapter error
  TNS-00511: No listener
   Linux Error: 111: Connection refused

This is what journalctl reports from oracle-xe service's start method:

Jan 22 20:55:09 localhost.localdomain su[9121]: (to oracle) root on none
Jan 22 20:55:11 localhost.localdomain oracle-xe[9085]: ORACLE instance started.
Jan 22 20:55:11 localhost.localdomain oracle-xe[9085]: Total System Global Area 1068937216 bytes
Jan 22 20:55:11 localhost.localdomain oracle-xe[9085]: Fixed Size                    2233344 bytes
Jan 22 20:55:11 localhost.localdomain oracle-xe[9085]: Variable Size                  616565760 bytes
Jan 22 20:55:11 localhost.localdomain oracle-xe[9085]: Database Buffers          444596224 bytes
Jan 22 20:55:11 localhost.localdomain oracle-xe[9085]: Redo Buffers                    5541888 bytes
Jan 22 20:55:15 localhost.localdomain oracle-xe[9085]: Database mounted.
Jan 22 20:55:18 localhost.localdomain oracle-xe[9085]: Database opened.
Jan 22 20:55:18 localhost.localdomain systemd[1]: Started SYSV: This is a program that is responsible for taking care of.
Jan 22 21:22:56 localhost.localdomain systemd[1]: Stopping SYSV: This is a program that is responsible for taking care of...
Jan 22 21:22:56 localhost.localdomain oracle-xe[10575]: Shutting down Oracle Database 11g Express Edition instance.
Jan 22 21:22:57 localhost.localdomain oracle-xe[10575]: ORA-01034: ORACLE not available
Jan 22 21:22:57 localhost.localdomain oracle-xe[10575]: ORA-27101: shared memory realm does not exist
Jan 22 21:22:57 localhost.localdomain oracle-xe[10575]: Linux-x86_64 Error: 2: No such file or directory
Jan 22 21:22:57 localhost.localdomain oracle-xe[10575]: Stopping Oracle Net Listener.
Jan 22 21:22:57 localhost.localdomain oracle-xe[10575]: LSNRCTL for Linux: Version 11.2.0.2.0 - Production on 22-JAN-2018 21:22:57
Jan 22 21:22:57 localhost.localdomain oracle-xe[10575]: Copyright (c) 1991, 2011, Oracle.  All rights reserved.
Jan 22 21:22:57 localhost.localdomain oracle-xe[10575]: Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
Jan 22 21:22:58 localhost.localdomain oracle-xe[10575]: TNS-12541: TNS:no listener
Jan 22 21:22:58 localhost.localdomain oracle-xe[10575]:  TNS-12560: TNS:protocol adapter error
Jan 22 21:22:58 localhost.localdomain oracle-xe[10575]:   TNS-00511: No listener
Jan 22 21:22:58 localhost.localdomain oracle-xe[10575]:    Linux Error: 111: Connection refused
Jan 22 21:22:58 localhost.localdomain oracle-xe[10575]: Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost.localdomain)(PORT=1521)))
Jan 22 21:22:58 localhost.localdomain oracle-xe[10575]: TNS-12541: TNS:no listener
Jan 22 21:22:58 localhost.localdomain oracle-xe[10575]:  TNS-12560: TNS:protocol adapter error
Jan 22 21:22:58 localhost.localdomain oracle-xe[10575]:   TNS-00511: No listener
Jan 22 21:22:58 localhost.localdomain oracle-xe[10575]:    Linux Error: 111: Connection refused
Jan 22 21:22:58 localhost.localdomain systemd[1]: Stopped SYSV: This is a program that is responsible for taking care of.
Jan 22 21:22:58 localhost.localdomain systemd[1]: Starting SYSV: This is a program that is responsible for taking care of...
Jan 22 21:22:58 localhost.localdomain oracle-xe[10620]: Starting Oracle Net Listener.
Jan 22 21:22:58 localhost.localdomain su[10630]: (to oracle) root on none
Jan 22 21:22:58 localhost.localdomain oracle-xe[10620]: LSNRCTL for Linux: Version 11.2.0.2.0 - Production on 22-JAN-2018 21:22:58
Jan 22 21:22:58 localhost.localdomain oracle-xe[10620]: Copyright (c) 1991, 2011, Oracle.  All rights reserved.
Jan 22 21:23:00 localhost.localdomain oracle-xe[10620]: Starting /u01/app/oracle/product/11.2.0/xe/bin/tnslsnr: please wait...
Jan 22 21:23:00 localhost.localdomain oracle-xe[10620]: TNSLSNR for Linux: Version 11.2.0.2.0 - Production
Jan 22 21:23:00 localhost.localdomain oracle-xe[10620]: System parameter file is /u01/app/oracle/product/11.2.0/xe/network/admin/listener.ora
Jan 22 21:23:00 localhost.localdomain oracle-xe[10620]: Log messages written to /u01/app/oracle/diag/tnslsnr/localhost/listener/alert/log.xml
Jan 22 21:23:00 localhost.localdomain oracle-xe[10620]: Error listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
Jan 22 21:23:00 localhost.localdomain oracle-xe[10620]: TNS-12555: TNS:permission denied
Jan 22 21:23:00 localhost.localdomain oracle-xe[10620]:  TNS-12560: TNS:protocol adapter error
Jan 22 21:23:00 localhost.localdomain oracle-xe[10620]:   TNS-00525: Insufficient privilege for operation
Jan 22 21:23:00 localhost.localdomain oracle-xe[10620]:    Linux Error: 1: Operation not permitted
Jan 22 21:23:00 localhost.localdomain oracle-xe[10620]: Listener failed to start. See the error message(s) above...
Jan 22 21:23:00 localhost.localdomain oracle-xe[10620]: Starting Oracle Database 11g Express Edition instance.
Jan 22 21:23:00 localhost.localdomain su[10655]: (to oracle) root on none
Jan 22 21:23:02 localhost.localdomain oracle-xe[10620]: ORACLE instance started.
Jan 22 21:23:02 localhost.localdomain oracle-xe[10620]: Total System Global Area 1068937216 bytes
Jan 22 21:23:02 localhost.localdomain oracle-xe[10620]: Fixed Size                    2233344 bytes
Jan 22 21:23:02 localhost.localdomain oracle-xe[10620]: Variable Size                  616565760 bytes
Jan 22 21:23:02 localhost.localdomain oracle-xe[10620]: Database Buffers          444596224 bytes
Jan 22 21:23:02 localhost.localdomain oracle-xe[10620]: Redo Buffers                    5541888 bytes
Jan 22 21:23:07 localhost.localdomain oracle-xe[10620]: Database mounted.
Jan 22 21:23:08 localhost.localdomain oracle-xe[10620]: Database opened.
Jan 22 21:23:08 localhost.localdomain systemd[1]: Started SYSV: This is a program that is responsible for taking care of.

If I run lsnrctl start after calling sudo service oracle-xe start the database becomes alive again.