Description of problem:

mokutil --db outputs nothing when UEFI db is not empty (these certificates have been successfully added to the .platform keyring).

[root@ampere-mtsnow-altramax-56 ~]# mokutil --db

1. only one MOK key
   [root@ampere-mtsnow-altramax-56 ~]# mokutil --list-enrolled
   [key 1]
   SHA1 Fingerprint: cf:92:30:e6:90:00:07:67:27:e5:b7:84:ec:87:1d:22:71:6d:c5:da
   Certificate:
   Data:
   Version: 3 (0x2)
   Serial Number:
   ad:8e:19:64:68:34:ff:5d
   Signature Algorithm: sha256WithRSAEncryption
   Issuer: CN=Red Hat Secure Boot (CA key 1)/emailAddress=secalert@redhat.com
   Subject: CN=Red Hat Secure Boot (CA key 1)/emailAddress=secalert@redhat.com
2. Red Hat Secure Boot (CA key 1) is the VENDOR_CERT
3. the rest certificates are from UEFI db
   [root@ampere-mtsnow-altramax-56 ~]# keyctl show %:.platform
   Keyring
   908170642 ---lswrv 0 0 keyring: .platform
   361514782 ---lswrv 0 0 _ asymmetric: SUSE Linux Enterprise Secure Boot CA: 3d4d40cf938539024b1cfc5a12dedfe8b17e755f
   281841880 ---lswrv 0 0 _ asymmetric: Red Hat Secure Boot (CA key 1): 4016841644ce3a810408050766e8f8a29c65f85c
   466944821 ---lswrv 0 0 _ asymmetric: Microsoft Corporation UEFI CA 2011: 13adbf4309bd82709c8cd54f316ed522988a1bd4
   137624747 ---lswrv 0 0 _ asymmetric: Microsoft Windows Production PCA 2011: a92902398e16c49778cd90f99e4f9ae17c55af53
   777544007 ---lswrv 0 0 _ asymmetric: Fedora Secure Boot CA: fde32599c2d61db1bf5807335d7b20e4cd963b42
   797997726 ---lswrv 0 0 _ asymmetric: Canonical Ltd. Master Certificate Authority: ad91990bc22ab1f517048c23b6655a268e345a63

Version-Release number of selected component (if applicable):

How reproducible:

Always

Steps to Reproduce:
1. Install RHEL9.3 on an UEFI machine e.g. ampere-mtsnow-altramax-56.khw4.lab.eng.bos.redhat.com which has non-empty factory default db
2. mokutil --db

Actual results:

"mokutil --db" outputs nothing.

Expected results:

"mokutil --db" should list the certificates in UEFI db.

Additional info:

This can be reproduced on Fedora 38 and 39 as well.