CVE-2026-5950

A flaw was found in BIND 9. A remote, unauthenticated attacker can exploit an unbounded resend loop vulnerability in the resolver state machine during bad-server handling. By sending specially crafted queries that trigger specific retry conditions, the attacker can cause severe resource exhaustion, leading to a Denial of Service (DoS).

Moderate: This flaw in the BIND 9 resolver's state machine can lead to severe resource exhaustion. A remote, unauthenticated attacker could exploit this by sending specially crafted queries that trigger an unbounded resend loop during bad-server handling, potentially causing a denial of service in affected Red Hat products utilizing BIND as a resolver.

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.