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CVE-2026-19662 is a remotely reachable use-after-free vulnerability in BIND 9 named recursive resolver qpcache processing of DNSSEC NOQNAME proofs. An attacker operating an authoritative server for a DNSSEC-signed zone can return a specially crafted, ordered, and timed sequence of DNS responses to multiple resolver queries. This can cause named to access freed memory and abort. Affected releases are BIND 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, Supported Preview Edition 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.
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A use-after-free denial-of-service vulnerability in the BIND 9 named DNS resolver. An attacker controlling an authoritative DNSSEC-signed zone can cause a victim resolver to abort through crafted response sequencing and timing.
A remotely exploitable use-after-free denial-of-service vulnerability in BIND 9's named recursive resolver qpcache handling of DNSSEC NOQNAME proofs. Successful exploitation causes an unexpected resolver process exit; confidentiality and integrity impact are not stated.
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Cross-references every affected SKU, including bundled OEM variants.
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