The Internet Systems Consortium (ISC)2 released updates for the BIND DNS software to address several vulnerabilities that can be exploited by attackers to trigger denial-of-service (DoS) conditions and potentially to remotely execute arbitrary code. The most serious vulnerability, tracked as CVE-2021-25216, is a buffer overflow issue that can lead to a server crash and under specific conditions to remote code execution. The good news is that the ISC was not aware of any attacks exploiting the above vulnerabilities.”]
Source: https://securityaffairs.co/wordpress/117414/security/bind-dns-servers-flaws.html