CVE-2026-104034

A flaw was found in SSSD. A use-after-free vulnerability exists in the Kerberos Credential Manager (KCM) responder during Kerberos ticket-granting ticket (TGT) renewal, where a deferred callback accesses memory that has already been released. An authenticated local user with a renewable Kerberos ticket can trigger this issue on systems configured with KCM renewal, causing the KCM responder service to crash and resulting in a Denial of Service (DoS).

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-2026-104034
https://bugzilla.redhat.com/show_bug.cgi?id=2479178

Configurations

No configuration.

History

06 Oct 2026, 01:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-06 01:16

Updated : 2026-10-06 15:17

NVD link : CVE-2026-104034

Mitre link : CVE-2026-104034

CVE.ORG link : CVE-2026-104034

JSON object : View

Products Affected

No product.

CWE

CWE-825

Expired Pointer Dereference

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