Description of problem:
It happened during a dnf update

Eliminado:
  kernel.x86_64 4.12.5-300.fc26                kernel-core.x86_64 4.12.5-300.fc26                                kernel-devel.x86_64 4.12.5-300.fc26  kernel-modules.x86_64 4.12.5-300.fc26 
  kernel-modules-extra.x86_64 4.12.5-300.fc26  kmod-nvidia-340xx-4.12.5-300.fc26.x86_64.x86_64 1:340.102-4.fc26 

Instalado:
  kernel.x86_64 4.12.11-300.fc26                      kernel-core.x86_64 4.12.11-300.fc26        kernel-devel.x86_64 4.12.11-300.fc26        kernel-modules.x86_64 4.12.11-300.fc26       
  kernel-modules-extra.x86_64 4.12.11-300.fc26       

Actualizado:
  autocorr-en.noarch 1:5.3.6.1-5.fc26                        bluez.x86_64 5.46-6.fc26                                      bluez-cups.x86_64 5.46-6.fc26                                   
  bluez-libs.x86_64 5.46-6.fc26                              bluez-obexd.x86_64 5.46-6.fc26                                emacs-filesystem.noarch 1:25.3-1.fc26                           
  ffmpeg-libs.x86_64 3.3.3-4.fc26                            file.x86_64 5.30-11.fc26                                      file-libs.x86_64 5.30-11.fc26                                   
  flatpak.x86_64 0.9.10-1.fc26                               flatpak-libs.x86_64 0.9.10-1.fc26                             fpaste.noarch 0.3.9.1-1.fc26                                    
  gawk.x86_64 4.1.4-4.fc26                                   gdb.x86_64 8.0.1-26.fc26                                      gdb-headless.x86_64 8.0.1-26.fc26                               
  gnome-online-accounts.x86_64 3.24.3-1.fc26                 google-chrome-stable.x86_64 61.0.3163.91-1                    kernel-headers.x86_64 4.12.11-300.fc26                          
  kernel-tools-libs.x86_64 4.12.11-300.fc26                  libreoffice-calc.x86_64 1:5.3.6.1-5.fc26                      libreoffice-core.x86_64 1:5.3.6.1-5.fc26                        
  libreoffice-data.noarch 1:5.3.6.1-5.fc26                   libreoffice-draw.x86_64 1:5.3.6.1-5.fc26                      libreoffice-emailmerge.x86_64 1:5.3.6.1-5.fc26                  
  libreoffice-filters.x86_64 1:5.3.6.1-5.fc26                libreoffice-graphicfilter.x86_64 1:5.3.6.1-5.fc26             libreoffice-gtk2.x86_64 1:5.3.6.1-5.fc26                        
  libreoffice-gtk3.x86_64 1:5.3.6.1-5.fc26                   libreoffice-impress.x86_64 1:5.3.6.1-5.fc26                   libreoffice-langpack-en.x86_64 1:5.3.6.1-5.fc26                 
  libreoffice-math.x86_64 1:5.3.6.1-5.fc26                   libreoffice-ogltrans.x86_64 1:5.3.6.1-5.fc26                  libreoffice-opensymbol-fonts.noarch 1:5.3.6.1-5.fc26            
  libreoffice-pdfimport.x86_64 1:5.3.6.1-5.fc26              libreoffice-pyuno.x86_64 1:5.3.6.1-5.fc26                     libreoffice-ure.x86_64 1:5.3.6.1-5.fc26                         
  libreoffice-ure-common.noarch 1:5.3.6.1-5.fc26             libreoffice-writer.x86_64 1:5.3.6.1-5.fc26                    libreoffice-x11.x86_64 1:5.3.6.1-5.fc26                         
  libreoffice-xsltfilter.x86_64 1:5.3.6.1-5.fc26             libwmf-lite.x86_64 0.2.8.4-53.fc26                            perl-Date-Manip.noarch 6.60-1.fc26                              
  python2-pyOpenSSL.noarch 16.2.0-5.fc26                     python3-pyOpenSSL.noarch 16.2.0-5.fc26                        qemu-block-curl.x86_64 2:2.9.1-1.fc26                           
  qemu-block-dmg.x86_64 2:2.9.1-1.fc26                       qemu-block-gluster.x86_64 2:2.9.1-1.fc26                      qemu-block-iscsi.x86_64 2:2.9.1-1.fc26                          
  qemu-block-nfs.x86_64 2:2.9.1-1.fc26                       qemu-block-rbd.x86_64 2:2.9.1-1.fc26                          qemu-block-ssh.x86_64 2:2.9.1-1.fc26                            
  qemu-common.x86_64 2:2.9.1-1.fc26                          qemu-guest-agent.x86_64 2:2.9.1-1.fc26                        qemu-img.x86_64 2:2.9.1-1.fc26                                  
  qemu-kvm.x86_64 2:2.9.1-1.fc26                             qemu-system-x86.x86_64 2:2.9.1-1.fc26                         qemu-system-x86-core.x86_64 2:2.9.1-1.fc26                      
  vim-common.x86_64 2:8.0.1097-1.fc26                        vim-enhanced.x86_64 2:8.0.1097-1.fc26                         vim-filesystem.x86_64 2:8.0.1097-1.fc26                         
  vim-minimal.x86_64 2:8.0.1097-1.fc26 
SELinux is preventing abrt-action-sav from 'write' accesses on the file /var/lib/rpm/Sha1header.

*****  Plugin restorecon (94.8 confidence) suggests   ************************

If quiere arreglar la etiqueta.
La etiqueta predeterminada de /var/lib/rpm/Sha1header debería ser rpm_var_lib_t.
Then you can run restorecon. The access attempt may have been stopped due to insufficient permissions to access a parent directory in which case try to change the following command accordingly.
Do
# /sbin/restorecon -v /var/lib/rpm/Sha1header

*****  Plugin catchall_labels (5.21 confidence) suggests   *******************

If you want to allow abrt-action-sav to have write access on the Sha1header file
Then necesita modificar la etiqueta en /var/lib/rpm/Sha1header
Do
# semanage fcontext -a -t FILE_TYPE '/var/lib/rpm/Sha1header'
donde FILE_TYPE es uno de los siguientes: abrt_etc_t, abrt_tmp_t, abrt_upload_watch_tmp_t, abrt_var_cache_t, abrt_var_log_t, abrt_var_run_t, afs_cache_t, initrc_tmp_t, mock_var_lib_t, postfix_postdrop_t, puppet_tmp_t, rpm_log_t, rpm_var_cache_t, rpm_var_run_t, sysfs_t, user_cron_spool_t, user_tmp_t. 
Luego ejecute: 
restorecon -v '/var/lib/rpm/Sha1header'


*****  Plugin catchall (1.44 confidence) suggests   **************************

If cree que de manera predeterminada, abrt-action-sav debería permitir acceso write sobre Sha1header file.     
Then debería reportar esto como un error.
Puede generar un módulo de política local para permitir este acceso.
Do
allow this access for now by executing:
# ausearch -c 'abrt-action-sav' --raw | audit2allow -M my-abrtactionsav
# semodule -X 300 -i my-abrtactionsav.pp

Additional Information:
Source Context                system_u:system_r:abrt_t:s0-s0:c0.c1023
Target Context                unconfined_u:object_r:var_lib_t:s0
Target Objects                /var/lib/rpm/Sha1header [ file ]
Source                        abrt-action-sav
Source Path                   abrt-action-sav
Port                          <Desconocido>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           rpm-4.13.0.1-7.fc26.x86_64
Policy RPM                    selinux-policy-3.13.1-260.8.fc26.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Host Name                     (removed)
Platform                      Linux (removed) 4.12.9-300.fc26.x86_64 #1 SMP Fri
                              Aug 25 13:09:43 UTC 2017 x86_64 x86_64
Alert Count                   5
First Seen                    2017-01-15 23:36:33 CST
Last Seen                     2017-09-14 12:58:07 CST
Local ID                      d311db1b-be5f-445a-b86a-de510aed7fd8

Raw Audit Messages
type=AVC msg=audit(1505415487.482:273): avc:  denied  { write } for  pid=17419 comm="abrt-action-sav" name="Sha1header" dev="dm-1" ino=1839651 scontext=system_u:system_r:abrt_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:var_lib_t:s0 tclass=file permissive=1


Hash: abrt-action-sav,abrt_t,var_lib_t,file,write

Version-Release number of selected component:
selinux-policy-3.13.1-260.8.fc26.noarch

Additional info:
component:      selinux-policy
reporter:       libreport-2.9.1
hashmarkername: setroubleshoot
kernel:         4.12.9-300.fc26.x86_64
type:           libreport

Potential duplicate: bug 1209244