When a Fedora 41 or RHEL 9.5 system is joined to an Active Directory domain by using Winbind, realmd configures the pam_winbind library with a cache type = FILE instead of KCM. Reproducible: Always Steps to Reproduce: 1. Install a clean Fedora 41 or RHEL 9.5 system. 2. Configure hostname, DNS and chronyd correctly so you can join a domain 3. Install the required components to perform the domain join operation: sudo dnf install \ realmd oddjob oddjob-mkhomedir samba-winbind-clients samba-winbind samba-common-tools samba-winbind-krb5-locator krb5-workstation 4. Join the system to the domain: realm join --membership-software=samba --client-software=winbind --user=user domain.com 5. Reboot the system and verify you have a Kerberos ticket by running klist Actual Results: The list of tickets returned by klist is empty. Expected Results: You have Kerberos Tickets. The pam_winbind module is configured incorrectly by realmd with the line krb5_ccache_type = FILE in /etc/security/pam_winbind.conf file. The Kerberos library will search for a Kerberos cache in SSSD-KCM by default both on RHEL 9.x and Fedora 40+ as specified in the /etc/krb5.conf.d/kcm_default_ccache file. Simply modifying the /etc/security/pam_winbind.conf file with krb5_ccache_type = KCM fixes the issue, and then you are able to use the Winbind PAM modules cached tickets by using the system Kerberos library. SSSD-KCM is installed by default and waits for a socket connection, no further configuration is required to have a working system.
This message is a reminder that Fedora Linux 41 is nearing its end of life. Fedora will stop maintaining and issuing updates for Fedora Linux 41 on 2025-12-15. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as EOL if it remains open with a 'version' of '41'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, change the 'version' to a later Fedora Linux version. Note that the version field may be hidden. Click the "Show advanced fields" button if you do not see it. Thank you for reporting this issue and we are sorry that we were not able to fix it before Fedora Linux 41 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora Linux, you are encouraged to change the 'version' to a later version prior to this bug being closed.
Fedora Linux 41 entered end-of-life (EOL) status on 2025-12-15. Fedora Linux 41 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora Linux please feel free to reopen this bug against that version. Note that the version field may be hidden. Click the "Show advanced fields" button if you do not see the version field. If you are unable to reopen this bug, please file a new report against an active release. Thank you for reporting this bug and we are sorry it could not be fixed.