CVE-2026-5946

A flaw was found in the bind component, specifically within the named daemon. This vulnerability allows a remote attacker to send specially crafted Domain Name System (DNS) messages. These messages, which use unusual classes or meta-classes, can trigger assertion failures in the named daemon when processed. Successful exploitation leads to an application level Denial of Service (DoS), making the DNS service unavailable.

This is rated as an Important denial of service vulnerability. The named daemon is susceptible to crashes when processing specially crafted DNS messages that utilize non-Internet (IN) classes or meta-classes. This can lead to service unavailability if an attacker sends malicious requests targeting recursion, dynamic updates, zone change notifications, or specific record type processing.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.