RHSA-2026:97077 - Security Advisory

Topic

An update for sssd is now available for Red Hat Enterprise Linux 10.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

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: out-of-bounds read in the sssd (CVE-2026-6245)
• sssd: Use-after-free crash in SSSD' 'sssd_pam' process (CVE-2026-12610)

Bug Fix(es) and Enhancement(s):

• Concurrent child processes trigger unnecessarily backtrace (JIRA:RHEL-108116)
• Performance impact with enumerate in SSSD > 2.7.3 (JIRA:RHEL-109754)
• Man page update: man sssd_krb5_localauth_plugin ? Missing disable = an2ln (JIRA:RHEL-123943)
• [RFE] SSSD PAM: Support Microsoft AD PKINIT authentication indicator (ms-pkca) for pam_gssapi_indicators_map (JIRA:RHEL-138905)
• Poor performance of `BE_REQ_INITGROUPS` handling by 'sssd_be' (LDAP RFC2307, no nested groups) (JIRA:RHEL-142964)
• SSSD needs to add Plasma Login Manager to the PAM services whitelist for the AD provider (JIRA:RHEL-154156)
• Detect foreign security principals in AD group members and silently ignore them (JIRA:RHEL-5049)
• [RfE] sssd_oidc: IdP client using TLS Certificate for authentication (JIRA:RHEL-83540)
• SSSD kerberos plugins export symbols which clash (JIRA:RHEL-151491)
• sssd_be segfaults with option "enumerate = true" with `id_provider=ldap` (JIRA:RHEL-153036)
• SSSD: LDAP backend ('sssd_be') initialization fails if DNS in unresponsive (JIRA:RHEL-172303)
• SSSD 2.13 doesn't work in offline mode, generates plenty of Permission denied errors (JIRA:RHEL-173660)
• [Regression] Cannot log in to FreeIPA account with password immediately after boot (JIRA:RHEL-173663)
• 'sssctl analyze --help' shows incorrect command in usage field (JIRA:RHEL-178180)
• Rebase SSSD for RHEL 10.3 (JIRA:RHEL-183331)
• Smart card reader with pinpad fails C_Login. (CKF_PROTECTED_AUTHENTICATION_PATH not handled correctly) (JIRA:RHEL-5054)
• 'sssctl config-check' does not work correctly for "Accessing AD with a MSA" (JIRA:RHEL-111571)
• Regression in IPA + Idp authentication with keycloak (JIRA:RHEL-185008)

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.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 10 Release Notes linked from the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 10 x86_64
• Red Hat Enterprise Linux for IBM z Systems 10 s390x
• Red Hat Enterprise Linux for Power, little endian 10 ppc64le
• Red Hat Enterprise Linux for ARM 64 10 aarch64
• Red Hat CodeReady Linux Builder for x86_64 10 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian 10 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 10 aarch64
• Red Hat CodeReady Linux Builder for IBM z Systems 10 s390x

Fixes

• BZ - 2457954 - CVE-2026-6245 sssd: out-of-bounds read in the sssd
• BZ - 2490288 - CVE-2026-12610 sssd: Use-after-free crash in SSSD' 'sssd_pam' process
• RHEL-109754 - Performance impact with enumerate in SSSD > 2.7.3
• RHEL-123943 - Man page update: man sssd_krb5_localauth_plugin ? Missing disable = an2ln
• RHEL-142964 - Poor performance of `BE_REQ_INITGROUPS` handling by 'sssd_be' (LDAP RFC2307, no nested groups)
• RHEL-154156 - SSSD needs to add Plasma Login Manager to the PAM services whitelist for the AD provider
• RHEL-5049 - Detect foreign security principals in AD group members and silently ignore them
• RHEL-83540 - [RfE] sssd_oidc: IdP client using TLS Certificate for authentication
• RHEL-151491 - SSSD kerberos plugins export symbols which clash
• RHEL-172303 - SSSD: LDAP backend ('sssd_be') initialization fails if DNS in unresponsive
• RHEL-173660 - SSSD 2.13 doesn't work in offline mode, generates plenty of Permission denied errors
• RHEL-173663 - [Regression] Cannot log in to FreeIPA account with password immediately after boot
• RHEL-183331 - Rebase SSSD for RHEL 10.3
• RHEL-5054 - Smart card reader with pinpad fails C_Login. (CKF_PROTECTED_AUTHENTICATION_PATH not handled correctly)
• RHEL-111571 - 'sssctl config-check' does not work correctly for "Accessing AD with a MSA"
• RHEL-185008 - Regression in IPA + Idp authentication with keycloak

CVEs

• CVE-2026-6245
• CVE-2026-12610

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/10/html/10.3_release_notes/index