CVE-2019-20393
CVSS v3
8.8
HIGH
EPSS Score
2.8 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
A double-free is present in libyang before v1.0-r1 in the function yyparse() when an empty description is used. Applications that use libyang to parse untrusted input yang files may be vulnerable to this flaw, which would cause a crash or potentially code execution.
Technical details
- Published
- 2020-01-22
Frequently asked questions
What is CVE-2019-20393?
A double-free is present in libyang before v1.0-r1 in the function yyparse() when an empty description is used. Applications that use libyang to parse untrusted input yang files may be vulnerable to this flaw, which would cause a crash or potentially code execution.
Is CVE-2019-20393 actively exploited?
Active exploitation of CVE-2019-20393 has not been confirmed. Its EPSS score was 2.8% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2019-20393?
CVE-2019-20393 has a CVSS v3 base score of 8.8 (HIGH severity).
Is CVE-2019-20393 affecting your environment?
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