A vulnerability was found in ISC BIND up to 9.18.48/9.18.49-S0/9.20.22/9.20.22-S1/9.21.21 . It has been rated as problematic . Impacted is an unknown function of the component DNS Message Handler . Performing a manipulation results in race condition. This vulnerability is known as CVE-2026-5947 . Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.