An AlmaLinux security update has been released, bringing important fixes to the System Security Services Daemon (SSSD) service. The update addresses a security issue where SSSD's default Kerberos configuration allows privilege escalation on AD-joined Linux systems, identified by CVE-2025-11561.

ALSA-2025:21020: sssd security update (Important)

ALSA-2025:21020: sssd security update (Important)

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AlmaLinux: 10
Type: Security
Severity: Important
Release date: 2026-01-14

Summary:

The System Security Services Daemon (SSSD) service provides a set of daemons to manage access to remote directories and authentication mechanisms. It also provides the Name Service Switch (NSS) and the Pluggable Authentication Modules (PAM) interfaces toward the system, and a pluggable back-end system to connect to multiple different account sources.

Security Fix(es):

* sssd: SSSD default Kerberos configuration allows privilege escalation on AD-joined Linux systems (CVE-2025-11561)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/10/ALSA-2025-21020.html

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Kind regards,
AlmaLinux Team