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5.4 Medium

CVE-2026-90462 Sssd: sssd: fail-open in ldap ppolicy access check allows continued authorization

Description

A flaw was found in SSSD. When configured with the LDAP access provider and `ldap_access_order` including `ppolicy` or `lockout`, a fail-open condition in the LDAP ppolicy access check can occur if a user lookup returns zero results. This can incorrectly return success and cache an allow decision, permitting continued authorization for a deleted or deprovisioned user. A remote attacker with prior valid account context could exploit this to maintain access to information and potentially make limited modifications to resources that should no longer be available.

CVSS 3.1 detail

Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Exploitable remotely over the network, with an ordinary account and without any user action; the impact on data or service is limited.

Attack vector
Network
Attack complexity
Low
Privileges required
Low
Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Affected products and versions

Product Affected versions Fixed in
Red Hat Enterprise Linux 10 Versions not published
Red Hat Enterprise Linux 6 Versions not published
Red Hat Enterprise Linux 7 Versions not published
Red Hat Enterprise Linux 8 Versions not published
Red Hat Enterprise Linux 9 Versions not published
Red Hat OpenShift Container Platform 4 Versions not published
Red Hat OpenShift Container Platform 5 Versions not published

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