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BIND 9 (9.20.0 Through 9.20.22)

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high threat

CVE-2026-3593 Use-After-Free Vulnerability in BIND 9 DNS-over-HTTPS

A use-after-free vulnerability in the DNS-over-HTTPS implementation of BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1 could allow an attacker to cause a denial of service or potentially execute arbitrary code.

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