CVE-2022-40304
CVSS v3
7.8
HIGH
EPSS Score
5.8 %
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. Certain invalid XML entity definitions can corrupt a hash table key, potentially leading to subsequent logic errors. In one case, a double-free can be provoked.
Technical details
- Published
- 2022-11-23
Frequently asked questions
What is CVE-2022-40304?
An issue was discovered in libxml2 before 2.10.3. Certain invalid XML entity definitions can corrupt a hash table key, potentially leading to subsequent logic errors. In one case, a double-free can be provoked.
Is CVE-2022-40304 actively exploited?
Active exploitation of CVE-2022-40304 has not been confirmed. Its EPSS score was 5.8% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2022-40304?
CVE-2022-40304 has a CVSS v3 base score of 7.8 (HIGH severity).
Is CVE-2022-40304 affecting your environment?
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