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CVE-2026-5946 is an assertion-failure vulnerability in ISC BIND 9's named daemon when processing DNS messages with a CLASS other than Internet (IN), including CHAOS and HESIOD, or meta-classes ANY and NONE in the question section. Multiple code paths incorrectly assume IN-class data, including recursion, dynamic update processing, zone-change notification handling, and processing of IN-specific record types in non-IN data. Crafted messages can reach assertions implemented with assert(), REQUIRE(), or INSIST(), causing the named process to abort. Affected versions are 9.11.0 through 9.16.50, 9.18.0 through 9.18.48, 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
32 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A remotely exploitable, low-complexity vulnerability requiring no privileges or user interaction that has a high availability impact, according to the supplied CVSS v3 vector. It is addressed by Huawei EulerOS SA-2026-3249 for EulerOS 2.0 BIND-related packages.
A remotely reachable, low-complexity, unauthenticated vulnerability in affected Huawei EulerOS 2.0 BIND packages with high availability impact and no stated confidentiality or integrity impact.
Unknown; the content lists this CVE as a reference but does not describe the vulnerability.
A BIND denial-of-service vulnerability triggered by specially crafted DNS messages.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.