CVE-2026-3593 | ISC BIND up to 9.21.21 DNS-over-HTTPS use after free

May 20, 2026 Yanac

A vulnerability was found in ISC BIND up to 9.18.47/9.18.48-S0/9.20.22/9.20.22-S1/9.21.21 and classified as critical. This affects an unknown part of the component DNS-over-HTTPS. The manipulation results in use after free.

This vulnerability is reported as CVE-2026-3593. The attack can be launched remotely. No exploit exists.

It is suggested to upgrade the affected component.VulDB Recent EntriesRead More