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Vulnerability record · CVE-2026-104046 · published 6 October 2026

CVE-2026-104046: Fedoraproject sssd allocation without limits vulnerability

Fedoraproject · Sssd

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.

6.2 CVSS 3.1 Medium EPSS 0.16% · top 94.7% CWE-770 · Allocation without limits
6.2CVSS 3.1 base score
0.16%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
2References, 1 tagged exploit
5 Nov 2026Last modified by NVD

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.

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/security/cve/CVE-2026-104046 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2478662 ExploitIssue TrackingMitigationVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-104046), CISA KEV, FIRST EPSS (scores of 2026-11-11). This page is refreshed as NVD updates the record.