Intermittent dnf failure with "RuntimeError: Parsing armored OpenPGP packet(s) failed" error on RHEL10.0

Issue

• dnf command fails intermittently on freshly installed RHEL10.0 with the following error:

  [root@test-rhel-10-0 ~]# dnf install tcpdump
  Updating Subscription Management repositories.
  Last metadata expiration check: 3:04:21 ago on Fri 05 Sep 2025 08:35:35 AM CEST.
  Dependencies resolved.
  ==========================================================================================
  Package      Architecture   Version              Repository                         Size
  ==========================================================================================
  Installing:
  tcpdump      x86_64         14:4.99.4-10.el10    rhel-10-for-x86_64-appstream-rpms  507 k
  Installing dependencies:
  libibverbs   x86_64         54.0-1.el10           rhel-10-for-x86_64-baseos-rpms    459 k
  libpcap      x86_64         14:1.10.4-7.el10      rhel-10-for-x86_64-baseos-rpms    178 k
  
  Transaction Summary
  ==========================================================================================
  Install  3 Packages
  
  Total size: 1.1 M
  Installed size: 2.8 M
  Is this ok [y/N]: y
  Downloading Packages:
  [SKIPPED] libibverbs-54.0-1.el10.x86_64.rpm: Already downloaded                                                                      
  [SKIPPED] libpcap-1.10.4-7.el10.x86_64.rpm: Already downloaded                                                                       
  [SKIPPED] tcpdump-4.99.4-10.el10.x86_64.rpm: Already downloaded                                                                      
  Red Hat Enterprise Linux 10 for x86_64 - BaseOS (RPMs)         3.6 MB/s | 3.7 kB     00:00    
  The downloaded packages were saved in cache until the next successful transaction.
  You can remove cached packages by executing 'dnf clean packages'.
  Traceback (most recent call last):
  File "/usr/bin/dnf", line 62, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python3.12/site-packages/dnf/cli/main.py", line 208, in user_main
    errcode = main(args)
        ^^^^^^^^^^
  File "/usr/lib/python3.12/site-packages/dnf/cli/main.py", line 67, in main
    return _main(base, args, cli_class, option_parser_class)
     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/site-packages/dnf/cli/main.py", line 106, in _main
    return cli_run(cli, base)
     ^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/site-packages/dnf/cli/main.py", line 130, in cli_run
    ret = resolving(cli, base)
    ^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/site-packages/dnf/cli/main.py", line 183, in resolving
    base.do_transaction(display=displays)
  File "/usr/lib/python3.12/site-packages/dnf/cli/cli.py", line 276, in do_transaction
    self.gpgsigcheck(install_pkgs)
  File "/usr/lib/python3.12/site-packages/dnf/cli/cli.py", line 332, in gpgsigcheck
    self._get_key_for_package(po, fn)
  File "/usr/lib/python3.12/site-packages/dnf/base.py", line 2555, in _get_key_for_package
    keys = dnf.crypto.retrieve(keyurl, repo)
     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/site-packages/dnf/crypto.py", line 137, in retrieve
    keyinfos = rawkey2infos(handle)
         ^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/site-packages/dnf/crypto.py", line 127, in rawkey2infos
    keys = libdnf.repo.Key.keysFromFd(key_fo.fileno())
     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.12/site-packages/libdnf/repo.py", line 341, in keysFromFd
    return _repo.Key_keysFromFd(fileDescriptor)
     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  RuntimeError: Parsing armored OpenPGP packet(s) failed
  

• when deploying RHEL 10.0 via kickstart, unattended dnf command in %post section may fail unpredictably