CVE-2022-40303: apple ipados Integer Overflow or Wraparound

Vulnerability summary

CVE-2022-40303 is a high (CVSS 7.5) Integer Overflow or Wraparound vulnerability in apple ipados. EPSS estimates a 41.37% chance of exploitation in the next 30 days, higher than 98.6% of scored vulnerabilities.

Timeline

1. 22-11-2022
   PublishedVulnerability first disclosed.
2. 14-10-2026
   Last modifiedVulnerability information updated.

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.

• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.