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Unrated severityNVD Advisory· Published Jul 23, 2026

Debian bind9: The BIND resolver accepts validly-signed NSEC records where the "Next Domain Nam…

CVE-2026-13321

Description

The BIND resolver accepts validly-signed NSEC records where the "Next Domain Name" field points outside the signer's zone. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.

Affected products

1
  • Isc/Bindllm-fuzzy
    Range: 9.11.0 <= v < 9.18.50, 9.20.0 <= v < 9.20.24, 9.21.0 <= v < 9.21.23, 9.11.3-S1 <= v < 9.18.50-S1, 9.20.9-S1 <= v < 9.20.24-S1

Patches

Vulnerability mechanics

News mentions

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