CVE Watch22 jul 2026

CVE-2026-11331

An attacker who knows (or guesses) that a resolver uses RPZ with wildcard CNAME policies can craft query names long enough to trigger a NAME

CVSS

7.5

Alto

EPSS

—

KEV

—

Exploit Today

—

0-100

Publicado: 22 jul 2026 · Última mod.: 22 jul 2026 · CWE-790

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

An attacker who knows (or guesses) that a resolver uses RPZ with wildcard CNAME policies can craft query names long enough to trigger a NAMETOOLONG error condition during RPZ processing. This is not handled correctly and may lead to defeating the RPZ rule. It also may lead to an unexpected exit of the BIND 9 software. This issue affects BIND 9 versions 9.16.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.16.8-S1 through 9.18.50-S1, 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-2026-11331

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