This vulnerability (CVE-2026-11605) in BIND involves uncontrolled resource consumption due to DNSSEC validation. BIND always validates all RRSIG records in DNS answers, including unnecessary ones, causing disproportionate CPU usage when an authoritative server returns many valid but superfluous RRSIG records. This can lead to denial of service conditions by exhausting CPU resources. The issue is tracked under Bugzilla 2504266 and classified as CWE-400 (Uncontrolled Resource Consumption). The Red Hat advisory identifies affected packages in Red Hat Hardened Images RPMs, specifically bind-9.18.50-22.hum1 for aarch64 and x86_64 architectures. No patch or fix is currently available as per the advisory.

The vulnerability can cause denial of service by exhausting CPU resources during DNSSEC validation, potentially slowing down or crashing the affected system. There is no impact on confidentiality or integrity, but availability is highly impacted. No known exploits are reported in the wild. The issue may also cause the product to fail open, potentially compromising security functionality under resource exhaustion conditions.

No official fix or patch is currently available for this vulnerability. Users should monitor Red Hat advisories for updates and apply patches once released. No vendor-provided mitigations or workarounds are documented at this time.