CVE-2019-19334: libyang: stack-based buffer overflow in make_canonical when identityref leaf type is used

Severity: Critical

CVSS Score: 9.8

In all versions of libyang before 1.0-r5, a stack-based buffer overflow was discovered in the way libyang parses YANG files with a leaf of type "identityref". An application that uses libyang to parse untrusted YANG files may be vulnerable to this flaw, which would allow an attacker to cause a denial of service or possibly gain code execution.