bind is vulnerable to denial of service. The vulnerability exists due to a buffer over-read.
www.openwall.com/lists/oss-security/2021/04/29/1
www.openwall.com/lists/oss-security/2021/04/29/2
www.openwall.com/lists/oss-security/2021/04/29/3
www.openwall.com/lists/oss-security/2021/04/29/4
cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
kb.isc.org/v1/docs/cve-2021-25215
lists.debian.org/debian-lts-announce/2021/05/msg00001.html
security-tracker.debian.org/tracker/CVE-2021-25216
security.netapp.com/advisory/ntap-20210521-0006/
www.debian.org/security/2021/dsa-4909
www.zerodayinitiative.com/advisories/ZDI-21-657/