---
id: CVE-2022-40303
title: An issue was discovered in libxml2 before 2.10.3
summary: >-
  An issue was discovered in libxml2 before 2.10.3. When parsing a
  multi-gigabyte XML document with the XML_PARSE_HUGE parser option enabled,
  several integer counters can overflow. This results in an attempt to access an
  array at a negativ…
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-190
  - CWE-190
vendor: xmlsoft
product: libxml2
affected:
  - libxml2 < 2.10.3
  - active_iq_unified_manager
  - clustered_data_ontap
  - clustered_data_ontap_antivirus_connector
  - netapp_manageability_sdk
  - ontap_select_deploy_administration_utility
  - snapmanager
  - ipados < 15.7.2
  - iphone_os < 15.7.2
  - 'macos >= 11.0, < 11.7.2'
  - 'macos >= 12.0, < 12.6.2'
  - tvos < 16.2
  - watchos < 9.2
  - h300s_firmware
  - h500s_firmware
  - h700s_firmware
  - h410s_firmware
  - h410c_firmware
patched:
  - libxml2 2.10.3
  - ipados 15.7.2
  - iphone_os 15.7.2
  - macos 12.6.2
  - tvos 16.2
  - watchos 9.2
published: '2022-11-23'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T18:17:04.783'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-40303'
references:
  - url: 'http://seclists.org/fulldisclosure/2022/Dec/21'
    label: cve@mitre.org
  - url: 'http://seclists.org/fulldisclosure/2022/Dec/24'
    label: cve@mitre.org
  - url: 'http://seclists.org/fulldisclosure/2022/Dec/25'
    label: cve@mitre.org
  - url: 'http://seclists.org/fulldisclosure/2022/Dec/26'
    label: cve@mitre.org
  - url: 'http://seclists.org/fulldisclosure/2022/Dec/27'
    label: cve@mitre.org
  - url: >-
      https://gitlab.gnome.org/GNOME/libxml2/-/commit/c846986356fc149915a74972bf198abc266bc2c0
    label: cve@mitre.org
  - url: 'https://gitlab.gnome.org/GNOME/libxml2/-/tags/v2.10.3'
    label: cve@mitre.org
  - url: 'https://security.netapp.com/advisory/ntap-20221209-0003/'
    label: cve@mitre.org
  - url: 'https://support.apple.com/kb/HT213531'
    label: cve@mitre.org
  - url: 'https://support.apple.com/kb/HT213533'
    label: cve@mitre.org
  - url: 'https://support.apple.com/kb/HT213534'
    label: cve@mitre.org
  - url: 'https://support.apple.com/kb/HT213535'
    label: cve@mitre.org
  - url: 'https://support.apple.com/kb/HT213536'
    label: cve@mitre.org
  - url: 'http://seclists.org/fulldisclosure/2022/Dec/21'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://seclists.org/fulldisclosure/2022/Dec/24'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://seclists.org/fulldisclosure/2022/Dec/25'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://seclists.org/fulldisclosure/2022/Dec/26'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://seclists.org/fulldisclosure/2022/Dec/27'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://gitlab.gnome.org/GNOME/libxml2/-/commit/c846986356fc149915a74972bf198abc266bc2c0
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://gitlab.gnome.org/GNOME/libxml2/-/tags/v2.10.3'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20221209-0003/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://support.apple.com/kb/HT213531'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://support.apple.com/kb/HT213533'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://support.apple.com/kb/HT213534'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://support.apple.com/kb/HT213535'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://support.apple.com/kb/HT213536'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-337522.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-341067.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - 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-556635.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-625862.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-769027.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
epss: 0.41365
epssPercentile: 0.98655
ingestedAt: '2026-10-14T18:47:39.275Z'
---

## Overview

An issue was discovered in libxml2 before 2.10.3. When parsing a multi-gigabyte XML document with the XML_PARSE_HUGE parser option enabled, several integer counters can overflow. This results in an attempt to access an array at a negative 2GB offset, typically leading to a segmentation fault.

## Affected

- `libxml2 < 2.10.3`
- `active_iq_unified_manager`
- `clustered_data_ontap`
- `clustered_data_ontap_antivirus_connector`
- `netapp_manageability_sdk`
- `ontap_select_deploy_administration_utility`
- `snapmanager`
- `ipados < 15.7.2`
- `iphone_os < 15.7.2`
- `macos >= 11.0, < 11.7.2`
- `macos >= 12.0, < 12.6.2`
- `tvos < 16.2`
- `watchos < 9.2`
- `h300s_firmware`
- `h500s_firmware`
- `h700s_firmware`
- `h410s_firmware`
- `h410c_firmware`

## Remediation

Upgrade past the affected range:

- `libxml2 2.10.3`
- `ipados 15.7.2`
- `iphone_os 15.7.2`
- `macos 12.6.2`
- `tvos 16.2`
- `watchos 9.2`