A stack consumption issue is present in libyang before v1.0-r1 due to the
self-referential union type containing leafrefs. Applications that use
libyang to parse untrusted input yang files may crash.
bugzilla.redhat.com/show_bug.cgi?id=1793924
github.com/CESNET/libyang/commit/4e610ccd87a2ba9413819777d508f71163fcc237
github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1
github.com/CESNET/libyang/issues/724
launchpad.net/bugs/cve/CVE-2019-20395
nvd.nist.gov/vuln/detail/CVE-2019-20395
security-tracker.debian.org/tracker/CVE-2019-20395
www.cve.org/CVERecord?id=CVE-2019-20395