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CVE-2026-77692 is an improper handling of an exceptional condition in BIND 9 named when processing DNS-over-HTTPS traffic containing a cryptographically invalid SIG(0) record. An unauthenticated remote attacker can send the crafted request and prematurely close the transport connection, causing named to abort. Affected releases include BIND 9.20.0 through 9.20.27, BIND 9.21.0 through 9.21.25, and affected BIND Supported Preview Edition releases.
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A high-severity, unauthenticated remote denial-of-service vulnerability in BIND 9 that permits an attacker to abort the named process with a single crafted DNS-over-HTTPS SIG(0) request.
A denial-of-service vulnerability in BIND 9's named daemon where a crafted DNS-over-HTTPS request containing a cryptographically invalid SIG(0) record, followed by premature transport-connection closure, can cause named to abort.
A high-severity unauthenticated remote denial-of-service vulnerability in BIND 9 named. A crafted DNS-over-HTTPS request containing a cryptographically invalid SIG(0) record, followed by premature transport-connection closure, can cause named to abort and terminate abnormally.
A network-accessible, low-complexity vulnerability with no authentication or user interaction required. The provided CVSS v3 vector indicates an availability-only impact rated High; the content associates it with Debian Linux 12.0, 13.0, and 14.0 and the bind9 package context.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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