Sssd: sssd: access control bypass via premature ldap access rule evaluation
Products / packages Red Hat Enterprise Linux 10 · Red Hat Enterprise Linux 6 · Red Hat Enterprise Linux 7 · 4 more
Published
Severity and exploitation
KEV coverage does not rule out exploitation.
Assessment vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:NSeverity
medium6.8CVSS measures technical severity, not the likelihood of an attack.
Known exploitation
Not listed in the checked CISA KEV catalog
Absence from CISA KEV does not rule out attacks.
Public exploit
Not established by this record
Missing evidence does not mean no public exploit exists.
Remediation
Source guidance available
Review the recorded instructions. Guidance may be a workaround rather than a fixed version.
What this means
A flaw in SSSD allows a remote authenticated user with an expired password to bypass access control restrictions. The user must be using an alternative authentication method, such as SSH public key authentication. The weakness is due to premature LDAP access rule evaluation.
Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.Attack conditions
When configured to evaluate password expiration warnings before restrictive access rules in LDAP (Lightweight Directory Access Protocol) environments, an expired-password warning terminates rule evaluation early and treats the access request as successful.
Excerpt from the original source description below.
Review supporting sources →Affected versions
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Red Hat · redhat
Red Hat Enterprise Linux 10
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Red Hat · redhat
Red Hat Enterprise Linux 10
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Other versions: affected
Product identifiers (CPE)
cpe:/a:redhat:enterprise_linux:10Red Hat · redhat
Red Hat Enterprise Linux 6
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Red Hat · redhat
Red Hat Enterprise Linux 6
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Other versions: unknown
Product identifiers (CPE)
cpe:/o:redhat:rhel_els:6Red Hat · redhat
Red Hat Enterprise Linux 7
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Red Hat · redhat
Red Hat Enterprise Linux 7
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Other versions: affected
Product identifiers (CPE)
cpe:/o:redhat:rhel_els:7Red Hat · redhat
Red Hat Enterprise Linux 8
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Red Hat · redhat
Red Hat Enterprise Linux 8
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Other versions: affected
Product identifiers (CPE)
cpe:/a:redhat:enterprise_linux:8Red Hat · redhat
Red Hat Enterprise Linux 9
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Red Hat · redhat
Red Hat Enterprise Linux 9
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Other versions: affected
Product identifiers (CPE)
cpe:/a:redhat:enterprise_linux:9Red Hat · redhat
Red Hat OpenShift Container Platform 4
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Red Hat · redhat
Red Hat OpenShift Container Platform 4
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Other versions: affected
Product identifiers (CPE)
cpe:/a:redhat:openshift:4Red Hat · redhat
Red Hat OpenShift Container Platform 4
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Red Hat · redhat
Red Hat OpenShift Container Platform 4
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Other versions: affected
Product identifiers (CPE)
cpe:/a:redhat:openshift:4Red Hat · redhat
Red Hat OpenShift Container Platform 5
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Red Hat · redhat
Red Hat OpenShift Container Platform 5
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Other versions: affected
Product identifiers (CPE)
cpe:/a:redhat:openshift:5What to do
Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.
The exposure can be removed by reordering the SSSD LDAP access rules without waiting for a package update. In the affected domain section of /etc/sssd/sssd.conf, set ldap_access_order so that restrictive rules such as filter, host, and rhost are evaluated before pwd_expire_policy_warn (for example, change ldap_access_order = pwd_expire_policy_warn, filter, host to ldap_access_order = filter, host, pwd_expire_policy_warn). Alternatively, replace pwd_expire_policy_warn with pwd_expire_policy_reject where accounts with expired passwords should not continue through the access chain. Restart the SSSD service (systemctl restart sssd) to apply the change. Note that restarting SSSD briefly interrupts active authentication requests and identity lookups, and switching to pwd_expire_policy_reject changes behavior so that users with expired passwords are denied instead of warned.
cve.new guidance unless attributed to a publisher. This page does not inspect your installation.
Public exploit evidence
No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.
Original source description
Read the full publisher description
A flaw was found in SSSD. When configured to evaluate password expiration warnings before restrictive access rules in LDAP (Lightweight Directory Access Protocol) environments, an expired-password warning terminates rule evaluation early and treats the access request as successful. A remote authenticated user with an expired password using an alternative authentication method, such as SSH public key authentication, can exploit this flaw to bypass access control restrictions and gain unauthorized access to protected systems.
References
2 sourcesInside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-92821View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.
cve.new JSON →Underlying weaknesses
The source’s classification of what caused the vulnerability.
Contributing organizations · 2
Assigning organization
Additional data publisher
Timeline
All times UTCAdvisory published
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Source updated
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Last imported by cve.new
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What changed
Follow changesLarge field values are marked as truncated previews. Original source snapshots remain retained.