CISA alert: ISC Berkeley Internet Name Domain (BIND)

ISC Releases Security Advisory for BIND | CISA

If you know what it is then you need to patch it.

The Internet Systems Consortium (ISC) has released a security advisory that addresses a vulnerability affecting version 9.18.0 of ISC Berkeley Internet Name Domain (BIND). A remote attacker could exploit this vulnerability to cause a denial-of-service condition.