There's also a denial for `getopt` which is otherwise similar:

Additional Information:
Source Context                system_u:system_r:modemmanager_t:s0
Target Context                system_u:system_r:modemmanager_t:s0
Target Objects                Unknown [ qipcrtr_socket ]
Source                        ModemManager
Source Path                   ModemManager
Port                          <Unknown>
Host                          <Unknown>
Source RPM Packages           
Target RPM Packages           
SELinux Policy RPM            selinux-policy-targeted-34.16-1.fc35.noarch
Local Policy RPM              selinux-policy-targeted-34.16-1.fc35.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Host Name                     fedora
Platform                      Linux fedora 5.14.0-0.rc6.46.fc35.x86_64 #1 SMP
                              Mon Aug 16 20:02:52 UTC 2021 x86_64 x86_64
Alert Count                   1
First Seen                    2021-08-23 16:05:50 PDT
Last Seen                     2021-08-23 16:05:50 PDT
Local ID                      bd3abac2-db79-4f77-972d-fdb342ec173a

Raw Audit Messages
type=AVC msg=audit(1629759950.336:165): avc:  denied  { getopt } for  pid=769 comm="ModemManager" scontext=system_u:system_r:modemmanager_t:s0 tcontext=system_u:system_r:modemmanager_t:s0 tclass=qipcrtr_socket permissive=1


Hash: ModemManager,modemmanager_t,modemmanager_t,qipcrtr_socket,getopt

...and `getattr`.

Following SELinux denials appear in permissive mode:
----
type=PROCTITLE msg=audit(09/07/2021 15:34:20.937:355) : proctitle=/usr/sbin/ModemManager 
type=SYSCALL msg=audit(09/07/2021 15:34:20.937:355) : arch=x86_64 syscall=socket success=yes exit=9 a0=qipcrtr a1=SOCK_DGRAM a2=ip a3=0x10 items=0 ppid=1 pid=3067 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=ModemManager exe=/usr/sbin/ModemManager subj=system_u:system_r:modemmanager_t:s0 key=(null) 
type=AVC msg=audit(09/07/2021 15:34:20.937:355) : avc:  denied  { module_request } for  pid=3067 comm=ModemManager kmod="net-pf-42" scontext=system_u:system_r:modemmanager_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=system permissive=1 
type=AVC msg=audit(09/07/2021 15:34:20.937:355) : avc:  denied  { create } for  pid=3067 comm=ModemManager scontext=system_u:system_r:modemmanager_t:s0 tcontext=system_u:system_r:modemmanager_t:s0 tclass=qipcrtr_socket permissive=1 
----
type=PROCTITLE msg=audit(09/07/2021 15:34:20.956:356) : proctitle=/usr/sbin/ModemManager 
type=SYSCALL msg=audit(09/07/2021 15:34:20.956:356) : arch=x86_64 syscall=getsockopt success=yes exit=0 a0=0x9 a1=SOL_SOCKET a2=SO_TYPE a3=0x7fff32a58a64 items=0 ppid=1 pid=3067 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=ModemManager exe=/usr/sbin/ModemManager subj=system_u:system_r:modemmanager_t:s0 key=(null) 
type=AVC msg=audit(09/07/2021 15:34:20.956:356) : avc:  denied  { getopt } for  pid=3067 comm=ModemManager scontext=system_u:system_r:modemmanager_t:s0 tcontext=system_u:system_r:modemmanager_t:s0 tclass=qipcrtr_socket permissive=1 
----
type=PROCTITLE msg=audit(09/07/2021 15:34:20.956:357) : proctitle=/usr/sbin/ModemManager 
type=SOCKADDR msg=audit(09/07/2021 15:34:20.956:357) : saddr={ saddr_fam=qipcrtr (unsupported) } 
type=SYSCALL msg=audit(09/07/2021 15:34:20.956:357) : arch=x86_64 syscall=getsockname success=yes exit=0 a0=0x9 a1=0x7fff32a58a70 a2=0x7fff32a58a60 a3=0x7fff32a58a64 items=0 ppid=1 pid=3067 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=ModemManager exe=/usr/sbin/ModemManager subj=system_u:system_r:modemmanager_t:s0 key=(null) 
type=AVC msg=audit(09/07/2021 15:34:20.956:357) : avc:  denied  { getattr } for  pid=3067 comm=ModemManager scontext=system_u:system_r:modemmanager_t:s0 tcontext=system_u:system_r:modemmanager_t:s0 tclass=qipcrtr_socket permissive=1 
----

# rpm -qa selinux\* Modem\* | sort
ModemManager-1.17.900-1.fc35.x86_64
ModemManager-glib-1.17.900-1.fc35.x86_64
selinux-policy-34.16-1.fc35.noarch
selinux-policy-targeted-34.16-1.fc35.noarch
#

*** Bug 2001141 has been marked as a duplicate of this bug. ***

*** Bug 2001143 has been marked as a duplicate of this bug. ***

*** Bug 2001144 has been marked as a duplicate of this bug. ***

*** Bug 2001145 has been marked as a duplicate of this bug. ***

*** Bug 2002580 has been marked as a duplicate of this bug. ***

Similar problem has been detected:

First boot - Immediately after a clean install.

hashmarkername: setroubleshoot
kernel:         5.14.0-60.fc35.x86_64
package:        selinux-policy-targeted-34.16-1.fc35.noarch
reason:         SELinux is preventing ModemManager from 'create' accesses on the qipcrtr_socket Sconosciuto.
type:           libreport

FEDORA-2021-bcef06e629 has been submitted as an update to Fedora 35. https://bodhi.fedoraproject.org/updates/FEDORA-2021-bcef06e629

FEDORA-2021-bcef06e629 has been pushed to the Fedora 35 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --advisory=FEDORA-2021-bcef06e629`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2021-bcef06e629

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

FEDORA-2021-bcef06e629 has been pushed to the Fedora 35 stable repository.
If problem still persists, please make note of it in this bug report.