What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-10-06 · updated 2026-10-13
• Weakness: CWE-770

Description

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.

Affected products

• [UNKNOWN] sssd: 2.12.0
• Red Hat Enterprise Linux: 7.0, 8.0, 9.0, 10.0
• Red Hat OpenShift Container Platform 4.18: 4.0

References

• https://access.redhat.com/security/cve/CVE-2026-104046
• https://bugzilla.redhat.com/show_bug.cgi?id=2478662

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