CVE-2026-104039

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.

CVSS v3 4.7 MEDIUM

4.7^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.0 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-104039
https://bugzilla.redhat.com/show_bug.cgi?id=2478956

Configurations

No configuration.

History

06 Oct 2026, 02:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-06 02:17

Updated : 2026-10-08 03:16

NVD link : CVE-2026-104039

Mitre link : CVE-2026-104039

CVE.ORG link : CVE-2026-104039

JSON object : View

Products Affected

No product.

CWE

CWE-825

Expired Pointer Dereference

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