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Vulnerability record · CVE-2026-104030 · published 5 October 2026

CVE-2026-104030: Fedoraproject sssd out-of-bounds read vulnerability

Fedoraproject · Sssd

A flaw was found in sssd. This vulnerability allows a local user to cause a Denial of Service (DoS) by submitting a specially crafted passkey authentication token that lacks null terminators. The authentication service reads past the end of the provided memory buffer, causing the process to crash and disrupting authentication services.

5.5 CVSS 3.1 Medium EPSS 0.12% · top 98.2% CWE-125 · Out-of-bounds read
5.5CVSS 3.1 base score
0.12%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. This vulnerability allows a local user to cause a Denial of Service (DoS) by submitting a specially crafted passkey authentication token that lacks null terminators. The authentication service reads past the end of the provided memory buffer, causing the process to crash and disrupting authentication services.

CVSS:3.1/AV:L/AC:L/PR:L/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-2026-104030 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2479429 ExploitIssue TrackingVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-104030), CISA KEV, FIRST EPSS (scores of 2026-11-11). This page is refreshed as NVD updates the record.