CVE-2019-20394
libyang: double-free in yyparse() when a type statement is used in a notification statement
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · April 26, 2019
Updated · November 22, 2025
Description
A double-free flaw occurs in libyang in function yyparse() when a type statement is used in a notification statement. Applications that use libyang to process untrusted input YANG files may be vulnerable to this flaw, possibly causing a crash or potential code execution.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 7CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-416 · Use After Free