CVE Catalog

CVE-2026-11605

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.67%

48th percentile - higher than 48% of all known CVEs

Summary

Resource exhaustion vulnerability in BIND related to DNSSEC validation. The server always validates all RRSIG records in a response, even if unnecessary, leading to excessive CPU usage.

Risk Assessment

An attacker can overload the DNS server, causing denial of service (DoS) and slowing down network infrastructure.

Recommendation

Upgrade BIND to version 9.20.25, 9.21.24 or later, depending on the branch used.

Other vulnerabilities in BIND

See all
Original NVD description (English source)

The issue is a resource exhaustion vulnerability associated with DNSSEC validation. BIND always validates all RRSIG records in an answer, even if they are not strictly needed. A query to an authoritative server/zone which returns many valid but superfluous RRSIG records causes the validator to waste disproportionate CPU time. This issue affects BIND 9 versions 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, and 9.20.9-S1 through 9.20.24-S1.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS