CVE-2022-40303: Integer Overflow or Wraparound

November 23, 2022 (updated November 9, 2023)

An issue was discovered in Nogokiri’s vendored libxml2 library. 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

nokogiri.org/CHANGELOG.html
nvd.nist.gov/vuln/detail/CVE-2022-40303

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