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Vulnerabilities / CVE-2026-3593

critical

CVE-2026-3593

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

Published Modified CWE 416, 825
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

Trivy's own label is CRITICAL. Rated critical by NVD, Photon OS. Rated lower by Red Hat (high), Azure Linux (high), Ubuntu (medium).

Description

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.

Affected packages and fixed versions

SourcePackageFixed in
Photon OS 5.0bindutils, bindutils-devel, bindutils-libs9.20.23-1.ph5
alpine 3.20bind9.18.49-r0
alpine 3.21bind9.18.49-r0
alpine 3.22bind9.20.23-r0
alpine 3.23bind9.20.23-r0
alpine 3.24bind9.20.23-r0
alpine edgebind9.20.23-r0
Azure Linux 3.0bind0:9.20.23-1.azl3
debian 13bind91:9.20.23-1~deb13u1
debian 14bind91:9.20.23-1
echobind91:9.20.23-1~deb13u1
minimosbind9.20.23-r0
Show all 38 entries from 25 sources
SourcePackageFixed in
Photon OS 5.0bindutils9.20.23-1.ph5
Photon OS 5.0bindutils-devel9.20.23-1.ph5
Photon OS 5.0bindutils-libs9.20.23-1.ph5
alpine 3.20bind9.18.49-r0
alpine 3.21bind9.18.49-r0
alpine 3.22bind9.20.23-r0
alpine 3.23bind9.20.23-r0
alpine 3.24bind9.20.23-r0
alpine edgebind9.20.23-r0
Azure Linux 3.0bind0:9.20.23-1.azl3
debian 13bind91:9.20.23-1~deb13u1
debian 14bind91:9.20.23-1
echobind91:9.20.23-1~deb13u1
minimosbind9.20.23-r0
rapidfort alpine 3.20bind9.18.49-r0, 9.20.23-r0
rapidfort alpine 3.21bind9.18.49-r0, 9.20.23-r0
rapidfort alpine 3.22bind9.18.49-r0, 9.20.23-r0
rapidfort alpine 3.23bind9.20.23-r0
rapidfort alpine 3.24bind9.20.23-r0
rapidfort debian 12bind90:9.20.23-1~deb13u1, 1:9.20.23-1
rapidfort debian 12rf-bind91:9.20.29-1~deb13u1
rapidfort debian 13bind90:9.20.23-1~deb13u1, 1:9.20.23-1
rapidfort debian 13rf-bind91:9.20.29-1~deb13u1
rapidfort fedora 43bind9-next32:9.21.22-2.fc43
rapidfort fedora 43bind9-next-chroot32:9.21.22-2.fc43
rapidfort fedora 43bind9-next-dnssec-utils32:9.21.22-2.fc43
rapidfort fedora 43bind9-next-doc32:9.21.22-2.fc43
rapidfort fedora 43bind9-next-libs32:9.21.22-2.fc43
rapidfort fedora 43bind9-next-license32:9.21.22-2.fc43
rapidfort fedora 43bind9-next-utils32:9.21.22-2.fc43
rapidfort ubuntu 20.04bind91:9.20.18-1ubuntu2.1
rapidfort ubuntu 20.04rf-bind91:9.20.11-1ubuntu2.4, 1:9.20.18-1ubuntu2.1
rapidfort ubuntu 22.04bind91:9.20.18-1ubuntu2.1
rapidfort ubuntu 22.04rf-bind91:9.20.11-1ubuntu2.4, 1:9.20.18-1ubuntu2.1
rapidfort ubuntu 24.04bind91:9.20.18-1ubuntu2.1
rapidfort ubuntu 24.04rf-bind91:9.20.11-1ubuntu2.4, 1:9.20.18-1ubuntu2.1
ubuntu 25.10bind91:9.20.11-1ubuntu2.4
ubuntu 26.04bind91:9.20.18-1ubuntu2.1

References

All 10 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.