alter.c in SQLite through 3.30.1 allows attackers to trigger infinite recursion via certain types of self-referential views in conjunction with ALTER TABLE statements.
https://www.tenable.com/security/tns-2021-14
https://www.oracle.com/security-alerts/cpuapr2020.html
https://usn.ubuntu.com/4394-1/
https://security.netapp.com/advisory/ntap-20191223-0001/
https://github.com/sqlite/sqlite/commit/38096961c7cd109110ac21d3ed7dad7e0cb0ae06
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf