---
id: CVE-2023-2953
title: A vulnerability was found in openldap
summary: >-
  A vulnerability was found in openldap. This security flaw causes a null
  pointer dereference in ber_memalloc_x() function.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-476
  - CWE-476
  - CWE-476
vendor: openldap
product: openldap
affected:
  - openldap = 2.4
  - enterprise_linux = 8.0
  - enterprise_linux = 9.0
  - 'macos >= 11.0, < 11.7.9'
  - 'macos >= 12.0, < 12.6.8'
  - 'macos >= 13.0, < 13.5'
  - active_iq_unified_manager
  - clustered_data_ontap
  - ontap_tools
  - h300s_firmware
  - h500s_firmware
  - h700s_firmware
  - h410s_firmware
  - h410c_firmware
patched:
  - macos 13.5
published: '2023-05-30'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T21:17:15.610'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-2953'
references:
  - url: 'http://seclists.org/fulldisclosure/2023/Jul/47'
    label: secalert@redhat.com
  - url: 'http://seclists.org/fulldisclosure/2023/Jul/48'
    label: secalert@redhat.com
  - url: 'http://seclists.org/fulldisclosure/2023/Jul/52'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2023-2953'
    label: secalert@redhat.com
  - url: 'https://bugs.openldap.org/show_bug.cgi?id=9904'
    label: secalert@redhat.com
  - url: 'https://security.netapp.com/advisory/ntap-20230703-0005/'
    label: secalert@redhat.com
  - url: 'https://support.apple.com/kb/HT213843'
    label: secalert@redhat.com
  - url: 'https://support.apple.com/kb/HT213844'
    label: secalert@redhat.com
  - url: 'https://support.apple.com/kb/HT213845'
    label: secalert@redhat.com
  - url: 'http://seclists.org/fulldisclosure/2023/Jul/47'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://seclists.org/fulldisclosure/2023/Jul/48'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://seclists.org/fulldisclosure/2023/Jul/52'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/security/cve/CVE-2023-2953'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugs.openldap.org/show_bug.cgi?id=9904'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20230703-0005/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://support.apple.com/kb/HT213843'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://support.apple.com/kb/HT213844'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://support.apple.com/kb/HT213845'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-398330.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-806742.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
epss: 0.0193
epssPercentile: 0.79595
ingestedAt: '2026-10-14T21:57:04.733Z'
---

## Overview

A vulnerability was found in openldap. This security flaw causes a null pointer dereference in ber_memalloc_x() function.

## Affected

- `openldap = 2.4`
- `enterprise_linux = 8.0`
- `enterprise_linux = 9.0`
- `macos >= 11.0, < 11.7.9`
- `macos >= 12.0, < 12.6.8`
- `macos >= 13.0, < 13.5`
- `active_iq_unified_manager`
- `clustered_data_ontap`
- `ontap_tools`
- `h300s_firmware`
- `h500s_firmware`
- `h700s_firmware`
- `h410s_firmware`
- `h410c_firmware`

## Remediation

Upgrade past the affected range:

- `macos 13.5`