CVE-2022-40303

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 41.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-11-23 · updated 2026-10-14
Weakness: CWE-190

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.

Affected products

Apple iPadOS: before 15.7.2 — fixed in 15.7.2
Apple Iphone Os: before 15.7.2 — fixed in 15.7.2
Apple macOS: from 11.0 before 11.7.2; from 12.0 before 12.6.2 — fixed in 11.7.2, 12.6.2
Apple tvOS: before 16.2 — fixed in 16.2
Apple watchOS: before 9.2 — fixed in 9.2
Active IQ Unified Manager for VMware vSphere, Linux, and Microsoft Windows: all versions
Clustered Data ONTAP: all versions
NetApp Clustered Data Ontap Antivirus Connector: all versions
NetApp H300S Firmware: all versions
NetApp H410C Firmware: all versions
NetApp H410S Firmware: all versions
NetApp H500S Firmware: all versions
NetApp H700S Firmware: all versions
Netapp Manageability Sdk: all versions
NetApp ONTAP Select Deploy administration utility: all versions
SnapManager for Oracle: all versions
xmlsoft libxml2: before 2.10.3 — fixed in 2.10.3

How to fix

Upgrade to a fixed version: Apple iPadOS 15.7.2; Apple Iphone Os 15.7.2; Apple macOS 11.7.2, 12.6.2; Apple tvOS 16.2; Apple watchOS 9.2; xmlsoft libxml2 2.10.3. Check the vendor advisory for mitigations.

References

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