CVE-2026-3593highCWE-416 CWE-825

Heap use-after-free vulnerability in BIND 9 DNS-over-HTTPS implementation

21Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 7.4epss 1.5%

probabilidad de explotación

1.5%top 28% de las CVE

explotación observada

noninguna fuente lo reporta

A use-after-free vulnerability exists within the DNS-over-HTTPS implementation. This issue affects 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. BIND 9 versions 9.18.0 through 9.18.48 and 9.18.11-S1 through 9.18.48-S1 are NOT affected.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

Productos afectados

ISC · BIND 9

Referencias

https://access.redhat.com/errata/RHSA-2026:7412 https://access.redhat.com/security/cve/CVE-2026-3593 https://bugzilla.redhat.com/show_bug.cgi?id=2479770 https://downloads.isc.org/isc/bind9/9.20.23 https://downloads.isc.org/isc/bind9/9.21.22 https://kb.isc.org/docs/cve-2026-3593 https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3593.json