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Vendor Workaround
A configuration-based workaround is available. Until a fix is shipped, avoid SSSD certificate mapping rules whose LDAPU1 maprule expands the {sid} or {sid.rid} templates (for example, 'maprule = LDAPU1:(objectsid={sid.rid})'). If SID-based mapping is required, reject certificates that lack the Microsoft SID extension (OID 1.3.6.1.4.1.311.25.2) before they reach the affected certificate mapping evaluation path, so SID-based rules fail cleanly instead of crashing the service.
Tracking
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Wed, 07 Oct 2026 21:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Tue, 06 Oct 2026 21:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Redhat openshift Container Platform
Sssd Sssd sssd |
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| Vendors & Products |
Redhat openshift Container Platform
Sssd Sssd sssd |
Tue, 06 Oct 2026 12:15:00 +0000
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| References |
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| Metrics |
threat_severity
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threat_severity
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Tue, 06 Oct 2026 00:45:00 +0000
| Type | Values Removed | Values Added |
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| Description | A flaw was found in sssd. A remote attacker can cause a denial of service (DoS) by submitting a certificate that lacks an expected Security Identifier (SID) extension. In deployments configured with SID-based certificate mapping rules, the service fails to verify the presence of the extension before processing it, causing the process to crash during authentication or lookup operations. | |
| Title | Sssd: sssd: denial of service via missing sid extension in certificate mapping | |
| First Time appeared |
Redhat
Redhat enterprise Linux Redhat openshift |
|
| Weaknesses | CWE-476 | |
| CPEs | cpe:/a:redhat:openshift:4 cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:6 cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
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| Vendors & Products |
Redhat
Redhat enterprise Linux Redhat openshift |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-10-16T10:57:42.402Z
Reserved: 2026-10-01T17:22:59.849Z
Link: CVE-2026-104038
Updated: 2026-10-07T20:07:53.211Z
Status : Undergoing Analysis
Published: 2026-10-06T01:16:34.853
Modified: 2026-10-07T21:17:07.993
Link: CVE-2026-104038
OpenCVE Enrichment
Updated: 2026-10-06T20:56:14Z
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CWE-476
NULL Pointer Dereference