Denial of Service Vulnerability in sssd for Red Hat Systems
CVE-2026-104044

6.2MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
6 October 2026

What is CVE-2026-104044?

A vulnerability has been identified in sssd, where a local attacker can exploit the system by sending a specially crafted Pluggable Authentication Module (PAM) request when passkey authentication is enabled. The flaw arises from a lack of state validation checks in the handling of passkey Kerberos, leading to the PAM responder dereferencing an uninitialized pointer, resulting in a crash. This disruption severely affects authentication services on the host system.

References

https://access.redhat.com/security/cve/CVE-2026-104044
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2478664
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
6.2
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This issue was discovered by Found by AISLE in partnership with Red Hat.
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