Description of problem:
The alert happens while browsing local files with Nemo file manager.
SELinux is preventing bwrap from 'mount' accesses on the filesystem /dev/shm.

*****  Plugin catchall (100. confidence) suggests   **************************

If you believe that bwrap should be allowed mount access on the shm filesystem by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c 'bwrap' --raw | audit2allow -M my-bwrap
# semodule -X 300 -i my-bwrap.pp

Additional Information:
Source Context                unconfined_u:unconfined_r:thumb_t:s0-s0:c0.c1023
Target Context                system_u:object_r:tmpfs_t:s0
Target Objects                /dev/shm [ filesystem ]
Source                        bwrap
Source Path                   bwrap
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
SELinux Policy RPM            selinux-policy-targeted-42.18-1.fc43.noarch
Local Policy RPM              selinux-policy-targeted-42.18-1.fc43.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 6.17.6-300.fc43.x86_64 #1 SMP
                              PREEMPT_DYNAMIC Wed Oct 29 20:10:51 UTC 2025
                              x86_64
Alert Count                   88
First Seen                    2025-12-05 07:52:15 EET
Last Seen                     2025-12-08 09:41:09 EET
Local ID                      accba371-0384-4f9c-a9df-98adf51c7566

Raw Audit Messages
type=AVC msg=audit(1765179669.835:8350): avc:  denied  { mount } for  pid=3276816 comm="bwrap" name="/" dev="tmpfs" ino=1 scontext=unconfined_u:unconfined_r:thumb_t:s0-s0:c0.c1023 tcontext=system_u:object_r:tmpfs_t:s0 tclass=filesystem permissive=0


Hash: bwrap,thumb_t,tmpfs_t,filesystem,mount

Version-Release number of selected component:
selinux-policy-targeted-42.18-1.fc43.noarch

Additional info:
reporter:       libreport-2.17.15
reason:         SELinux is preventing bwrap from 'mount' accesses on the filesystem /dev/shm.
package:        selinux-policy-targeted-42.18-1.fc43.noarch
component:      selinux-policy
hashmarkername: setroubleshoot
type:           libreport
kernel:         6.17.6-300.fc43.x86_64
comment:        The alert happens while browsing local files with Nemo file manager.
component:      selinux-policy