---
id: CVE-2026-73199
title: >-
  Ipa: freeipa: null pointer dereference in `ipa-enrollment` extended operation
  (`join_oid`) via missing request value
summary: >-
  A flaw was found in the `ipa-enrollment` SLAPI plugin. A remote authenticated
  client can exploit a null pointer dereference vulnerability by sending a
  malformed Lightweight Directory Access Protocol (LDAP) extended operation. By
  omitting…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-476
vendor: Red Hat
product: ipa
affected:
  - ipa (all versions)
  - ipa
  - ipa (all versions)
  - ipa (all versions)
  - ipa (all versions)
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-20T13:50:00.942062Z'
exploitAvailable: true
published: '2026-08-20'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T22:41:32.133Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-73199'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-73199'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2471741'
    label: RHBZ#2471741
tags:
  - cve.org
  - exploit-available
epss: 0.00354
epssPercentile: 0.2921
ingestedAt: '2026-11-05T23:41:31.945Z'
---

## Overview

A flaw was found in the `ipa-enrollment` SLAPI plugin. A remote authenticated client can exploit a null pointer dereference vulnerability by sending a malformed Lightweight Directory Access Protocol (LDAP) extended operation. By omitting the request value for the `JOIN_OID` in the `ipa-enrollment` extended operation, an attacker can trigger a server crash, potentially causing a denial of service.

## Affected

- `ipa (all versions)`
- `ipa`
- `ipa (all versions)`
- `ipa (all versions)`
- `ipa (all versions)`

## Remediation

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

### Workarounds

Restrict network access to the LDAP service to trusted clients only. This can be achieved by configuring firewall rules to allow connections only from known, trusted IP addresses or subnets, thereby limiting the ability of authenticated attackers to send malformed extended operations. If host enrollment functionality is not required, disabling the `ipa-enrollment` SLAPI plugin can remove this attack surface.