CVE Watch22 jul 2026

CVE-2026-11605

The issue is a resource exhaustion vulnerability associated with DNSSEC validation. BIND always validates all RRSIG records in an answer, ev

CVSS

7.5

Alto

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 22 jul 2026 · Última mod.: 22 jul 2026 · CWE-408

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

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.

Referencias oficiales

downloads.isc.orghttps://downloads.isc.org/isc/bind9/9.20.26
downloads.isc.orghttps://downloads.isc.org/isc/bind9/9.21.24
kb.isc.orghttps://kb.isc.org/docs/cve-2026-11605

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