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BIND 9 (9.21.0 - 9.21.21)

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high advisory

ISC BIND Use-After-Free Vulnerability Due to Race Condition (CVE-2026-5947)

A race condition in ISC BIND can lead to a use-after-free vulnerability (CVE-2026-5947) when handling SIG(0) signed DNS messages, potentially leading to undefined behavior.

BIND 9 +2 cve dns use-after-free denial-of-service
2r 1c