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Vulnerability record · CVE-2022-40303 · published 23 November 2022

CVE-2022-40303: Xmlsoft libxml2 integer overflow vulnerability

Xmlsoft · Libxml2

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.

7.5 CVSS 3.1 High EPSS 41% · top 1.4% CWE-190 · Integer overflow
7.5CVSS 3.1 base score
41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
17Affected product versions listed by NVD
26References
17 Jun 2026Last modified by NVD

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.

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

Affected products

17 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://seclists.org/fulldisclosure/2022/Dec/21 Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2022/Dec/24 Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2022/Dec/25 Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2022/Dec/26 Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2022/Dec/27
https://gitlab.gnome.org/GNOME/libxml2/-/commit/c846986356fc149915a74972bf198abc266bc2c0 PatchThird Party Advisory
https://gitlab.gnome.org/GNOME/libxml2/-/tags/v2.10.3 Release NotesThird Party Advisory
https://security.netapp.com/advisory/ntap-20221209-0003/ Third Party Advisory
https://support.apple.com/kb/HT213531 Third Party Advisory
https://support.apple.com/kb/HT213533 Third Party Advisory
https://support.apple.com/kb/HT213534 Third Party Advisory
https://support.apple.com/kb/HT213535 Third Party Advisory
https://support.apple.com/kb/HT213536 Third Party Advisory
http://seclists.org/fulldisclosure/2022/Dec/21 Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2022/Dec/24 Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2022/Dec/25 Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2022/Dec/26 Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2022/Dec/27
https://gitlab.gnome.org/GNOME/libxml2/-/commit/c846986356fc149915a74972bf198abc266bc2c0 PatchThird Party Advisory
https://gitlab.gnome.org/GNOME/libxml2/-/tags/v2.10.3 Release NotesThird Party Advisory
https://security.netapp.com/advisory/ntap-20221209-0003/ Third Party Advisory
https://support.apple.com/kb/HT213531 Third Party Advisory
https://support.apple.com/kb/HT213533 Third Party Advisory
https://support.apple.com/kb/HT213534 Third Party Advisory
https://support.apple.com/kb/HT213535 Third Party Advisory
https://support.apple.com/kb/HT213536 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2022-40303), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.