CVE-2026-104039
Medium
Description
A flaw was found in SSSD. A local user can cause a denial of service (DoS) by disrupting system authentication services. When handling Generic Security Services Application Programming Interface (GSSAPI) authentication in the Pluggable Authentication Module (PAM) responder, cached connection state is freed upon completion without clearing the reference pointer. An attacker can exploit this by sending an additional request over the same connection, causing the service to access invalid memory and unexpectedly terminate.
SeverityMedium
CVSS4.7
Exploit probability—
Product
Fedoraproject Sssd
PublishedOct 6, 2026
First seenOct 6, 2026
Weakness typeCWE-825CWE-825
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| fedoraproject sssd | 2.12.0 | — |
| redhat openshift_container_platform | 4.0 | — |
| redhat enterprise_linux | 7.0, 8.0, 9.0, 10.0 | — |
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