In function extgetplugin() in libyang <= v1.0.225, it doesn't check whether the value of revision is NULL. If revision is NULL, the operation of strcmp(revision, ext_plugins[u].revision) will lead to a crash.
{ "versions": [ { "introduced": "0" }, { "last_affected": "1.0.225" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-28904.json"