---
id: CVE-2026-104044
title: >-
  Sssd: sssd: denial of service via crafted passkey kerberos authentication
  request
summary: >-
  A flaw was found in sssd. A local attacker can trigger a Denial of Service
  (DoS) by sending a specially crafted Pluggable Authentication Module (PAM)
  request when passkey authentication is enabled. Due to a missing state
  validation check…
severity: medium
cvss: 6.2
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-476
vendor: Red Hat
product: sssd
affected:
  - sssd (all versions)
  - sssd
  - sssd (all versions)
  - sssd (all versions)
  - sssd (all versions)
  - openshift/ose-rhel-coreos-8 (all versions)
  - openshift/ose-rhel-coreos-9 (all versions)
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T01:02:22.041Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-104044'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-104044'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2478664'
    label: RHBZ#2478664
tags:
  - cve.org
ingestedAt: '2026-10-06T01:38:44.802Z'
---

## Overview

A flaw was found in sssd. A local attacker can trigger a Denial of Service (DoS) by sending a specially crafted Pluggable Authentication Module (PAM) request when passkey authentication is enabled. Due to a missing state validation check in passkey Kerberos handling, the PAM responder dereferences an uninitialized pointer and crashes. This failure disrupts authentication services on the host.

## Affected

- `sssd (all versions)`
- `sssd`
- `sssd (all versions)`
- `sssd (all versions)`
- `sssd (all versions)`
- `openshift/ose-rhel-coreos-8 (all versions)`
- `openshift/ose-rhel-coreos-9 (all versions)`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

### Workarounds

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.