Using the database provided, dnf update --security provides strange results.

https://file.rdu.redhat.com/~jcastran/03530805/dendvb3utaut21-rpm_db.tar.gz

~~~

1. alias yumr='yum --installroot=/test/ --setopt=tsflags=justdb'
2. alias rpmr'rpm --root=/test/'
3. mkdir /test/
4. tar xf dendvb3utaut21-rpm_db.tar.gz -C /test/
5. rpmr -q libnsl glibc
   libnsl-2.28-164.el8_5.3.i686
   libnsl-2.28-164.el8_5.3.x86_64
   glibc-2.28-164.el8_5.3.x86_64
   glibc-2.28-164.el8_5.3.i686

1. yumr updateinfo list --security --all | grep -E 'glibc-2|libnsl'
   i RHSA-2020:1828 Low/Sec. glibc-2.28-101.el8.i686
   i RHSA-2020:1828 Low/Sec. glibc-2.28-101.el8.x86_64
   i RHSA-2020:4444 Moderate/Sec. glibc-2.28-127.el8.i686
   i RHSA-2020:4444 Moderate/Sec. glibc-2.28-127.el8.x86_64
   i RHSA-2021:1585 Moderate/Sec. glibc-2.28-151.el8.i686
   i RHSA-2021:1585 Moderate/Sec. glibc-2.28-151.el8.x86_64
   i RHSA-2021:4358 Moderate/Sec. glibc-2.28-164.el8.i686
   i RHSA-2021:4358 Moderate/Sec. glibc-2.28-164.el8.x86_64
   i RHSA-2022:0896 Moderate/Sec. glibc-2.28-164.el8_5.3.i686
   i RHSA-2022:0896 Moderate/Sec. glibc-2.28-164.el8_5.3.x86_64
   i RHSA-2019:3513 Moderate/Sec. glibc-2.28-72.el8.i686
   i RHSA-2019:3513 Moderate/Sec. glibc-2.28-72.el8.x86_64
   i RHSA-2020:1828 Low/Sec. libnsl-2.28-101.el8.i686
   i RHSA-2020:1828 Low/Sec. libnsl-2.28-101.el8.x86_64
   i RHSA-2020:4444 Moderate/Sec. libnsl-2.28-127.el8.i686
   i RHSA-2020:4444 Moderate/Sec. libnsl-2.28-127.el8.x86_64
   i RHSA-2021:1585 Moderate/Sec. libnsl-2.28-151.el8.i686
   i RHSA-2021:1585 Moderate/Sec. libnsl-2.28-151.el8.x86_64
   i RHSA-2021:4358 Moderate/Sec. libnsl-2.28-164.el8.i686
   i RHSA-2021:4358 Moderate/Sec. libnsl-2.28-164.el8.x86_64
   i RHSA-2022:0896 Moderate/Sec. libnsl-2.28-164.el8_5.3.i686
   i RHSA-2022:0896 Moderate/Sec. libnsl-2.28-164.el8_5.3.x86_64
   i RHSA-2019:3513 Moderate/Sec. libnsl-2.28-72.el8.i686
   i RHSA-2019:3513 Moderate/Sec. libnsl-2.28-72.el8.x86_64

1. yumr update --security
   Error:
   Problem: package libnsl-2.28-164.el8_5.3.i686 requires glibc(x86-32) = 2.28-164.el8_5.3, but none of the providers can be installed

• cannot install both glibc-2.28-225.el8.i686 and glibc-2.28-164.el8_5.3.i686
• cannot install the best update candidate for package libnsl-2.28-164.el8_5.3.i686
• cannot install the best update candidate for package glibc-2.28-164.el8_5.3.i686
  (try to add '-allowerasing' to command line to replace conflicting packages or 'skip-broken' to skip uninstallable packages or '-nobest' to use not only best candidate packages)

~~~

Now the tricky part is, if you update glibc and libnsl, it works fine so we know the updates are present.

If you INSTALL ANY PACKAGE, it suddenly starts working.

~~~

1. yumr install sos -y
   Installed:
   python3-magic-5.33-20.el8.noarch python3-pexpect-4.3.1-3.el8.noarch
   python3-ptyprocess-0.5.2-4.el8.noarch sos-4.5.3-1.el8.noarch
2. rm -rf /test/etc/yum.repos.d/ ###Removing the blank redhat.repo that was generated to force the /test db to use the systems redhat.repo
3. yumr update --security glibc libnsl
   No security updates needed for "glibc", but 1 update available
   Dependencies resolved.
   ==============================================================================================
   Package Arch Version Repository Size
   ==============================================================================================
   Upgrading:
   glibc i686 2.28-225.el8 rhel-8-for-x86_64-baseos-rpms 2.0 M
   glibc x86_64 2.28-225.el8 rhel-8-for-x86_64-baseos-rpms 2.2 M
   glibc-common x86_64 2.28-225.el8 rhel-8-for-x86_64-baseos-rpms 1.0 M
   glibc-devel x86_64 2.28-225.el8 rhel-8-for-x86_64-baseos-rpms 83 k
   glibc-headers x86_64 2.28-225.el8 rhel-8-for-x86_64-baseos-rpms 488 k
   glibc-langpack-en x86_64 2.28-225.el8 rhel-8-for-x86_64-baseos-rpms 827 k
   libnsl i686 2.28-225.el8 rhel-8-for-x86_64-baseos-rpms 109 k
   libnsl x86_64 2.28-225.el8 rhel-8-for-x86_64-baseos-rpms 105 k
   Installing weak dependencies:
   glibc-gconv-extra i686 2.28-225.el8 rhel-8-for-x86_64-baseos-rpms 1.6 M
   glibc-gconv-extra x86_64 2.28-225.el8 rhel-8-for-x86_64-baseos-rpms 1.5 M

Transaction Summary
==============================================================================================
Install 2 Packages
Upgrade 8 Packages