flattenSubquery in select.c in SQLite 3.30.1 mishandles certain uses of SELECT DISTINCT involving a LEFT JOIN in which the right-hand side is a view. This can cause a NULL pointer dereference (or incorrect results). CREATE(Triage):(User=admin) [CVE-2019-19923|https://nvd.nist.gov/vuln/detail/CVE-2019-19923]
