Medium 6.2Published Oct 6, 2026

CVE-2026-104046Sssd: sssd: denial of service via incomplete identity provider authentication requests

Updated under an hour ago (2026-10-19 09:10 UTC)

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It affects Red Hat Enterprise Linux 10 and 3 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

A flaw was found in SSSD (System Security Services Daemon). When Identity Provider (IdP) authentication is enabled, pre-authentication requests retain state in memory without being cleared or timed out. A local attacker can repeatedly initiate authentication flows without completing them, causing unbounded memory consumption. This memory exhaustion can lead to a Denial of Service (DoS) by degrading or terminating SSSD authentication services.

CVSS: 6.2 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Analyzed
Record last updated: Oct 9, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	10	CNA record
Red Hat Red Hat OpenShift Container Platform 4 redhat:openshift	4	CNA record
fedoraproject sssd fedoraproject:sssd	2.12.0	NVD
redhat openshift_container_platform redhat:openshift_container_platform	4.0	NVD
redhat enterprise_linux redhat:enterprise_linux	7.0; 8.0; 9.0; 10.0	NVD

References

https://access.redhat.com/security/cve/CVE-2026-104046vdb-entry, x-refsource-redhat, vendor-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2478662issue-tracking, x-refsource-redhat, exploit, mitigation, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.