Vulnerability Database

308,820

Total vulnerabilities in the database

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.

  • Published: Jan 22, 2020
  • Updated: Nov 9, 2025
  • CVE: CVE-2019-20393
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 8.8
  • AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2:

  • Severity: Medium
  • Score: 6.8
  • AV:N/AC:M/Au:N/C:P/I:P/A:P

CWEs:

Software From Fixed in
cesnet / libyang 0.16-r1 0.16-r1.x
cesnet / libyang 0.16-r2 0.16-r2.x
cesnet / libyang 0.16-r3 0.16-r3.x
cesnet / libyang 0.13-r1 0.13-r1.x
cesnet / libyang 0.13-r2 0.13-r2.x
cesnet / libyang 0.12-r1 0.12-r1.x
cesnet / libyang 0.12-r2 0.12-r2.x
cesnet / libyang 0.11-r1 0.11-r1.x
cesnet / libyang 0.11-r2 0.11-r2.x
cesnet / libyang 0.14-r1 0.14-r1.x
cesnet / libyang 0.15-r1 0.15-r1.x