CVE-2022-40303
CVSS v3
7.5
HIGH
EPSS Score
41.4 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2022-11-23
Frequently asked questions
What is CVE-2022-40303?
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.
Is CVE-2022-40303 actively exploited?
Active exploitation of CVE-2022-40303 has not been confirmed. Its EPSS score was 41.4% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2022-40303?
CVE-2022-40303 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2022-40303 affecting your environment?
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