CVE-2022-40303

high

Description

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.

References

https://support.apple.com/kb/HT213536

https://support.apple.com/kb/HT213535

https://support.apple.com/kb/HT213534

https://support.apple.com/kb/HT213533

https://support.apple.com/kb/HT213531

https://security.netapp.com/advisory/ntap-20221209-0003/

https://gitlab.gnome.org/GNOME/libxml2/-/tags/v2.10.3

https://gitlab.gnome.org/GNOME/libxml2/-/commit/c846986356fc149915a74972bf198abc266bc2c0

http://seclists.org/fulldisclosure/2022/Dec/26

http://seclists.org/fulldisclosure/2022/Dec/25

http://seclists.org/fulldisclosure/2022/Dec/24

http://seclists.org/fulldisclosure/2022/Dec/21

https://www.cisa.gov/news-events/ics-advisories/icsa-25-044-09

https://www.cisa.gov/news-events/ics-advisories/icsa-24-165-10

https://www.cisa.gov/news-events/ics-advisories/icsa-24-165-06

https://www.cisa.gov/news-events/ics-advisories/icsa-24-165-04

https://cert-portal.siemens.com/productcert/html/ssa-556635.html

https://support.apple.com/en-us/HT213535

https://support.apple.com/en-us/HT213531

https://github.com/anicka-net/cve-backport-tool

https://github.com/Live-Hack-CVE/CVE-2022-40303

https://github.com/advisories/GHSA-2qc6-mcvw-92cw

https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-43600

http://seclists.org/fulldisclosure/2022/Dec/27

Details

Source: Mitre, NVD

Published: 2022-11-23

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High

EPSS

EPSS: 0.41365