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This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
Description
If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the resolver may consume excessive CPU. Authoritative-only servers are generally unaffected, although there are circumstances where authoritative servers may make recursive queries (see: https://kb.isc.org/docs/why-does-my-authoritative-server-make-recursive-queries).
This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.46, 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.46-S1, and 9.20.9-S1 through 9.20.20-S1.
Metrics
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vector strings. CVSS information contributed by other sources is also
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[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)","defaultStatus":"affected","cpes":["cpe:/o:redhat:rhel_els:6"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION)","defaultStatus":"affected","cpes":["cpe:/o:redhat:rhel_els:6"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux Server (v. 7 ELS)","defaultStatus":"affected","cpes":["cpe:/o:redhat:rhel_els:7"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux Server Optional (v. 7 ELS)","defaultStatus":"affected","cpes":["cpe:/o:redhat:rhel_els:7"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4.19","defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift:4.19::el9"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream EUS (v. 10.0)","defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream (v. 10)","defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux:10.1"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream (v. 8)","defaultStatus":"affected","cpes":["cpe:/a:redhat:enterprise_linux:8::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream AUS (v.8.4)","defaultStatus":"affected","cpes":["cpe:/a:redhat:rhel_aus:8.4::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)","defaultStatus":"affected","cpes":["cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream AUS (v.8.6)","defaultStatus":"affected","cpes":["cpe:/a:redhat:rhel_aus:8.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream E4S (v.8.6)","defaultStatus":"affected","cpes":["cpe:/a:redhat:rhel_e4s:8.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)","defaultStatus":"affected","cpes":["cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)","defaultStatus":"affected","cpes":["cpe:/o:redhat:rhel_els:6"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION)","defaultStatus":"affected","cpes":["cpe:/o:redhat:rhel_els:6"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux Server (v. 7 ELS)","defaultStatus":"affected","cpes":["cpe:/o:redhat:rhel_els:7"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux Server Optional (v. 7 ELS)","defaultStatus":"affected","cpes":["cpe:/o:redhat:rhel_els:7"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream EUS (v. 10.0)","defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream (v. 10)","defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux:10.1"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream (v. 8)","defaultStatus":"affected","cpes":["cpe:/a:redhat:enterprise_linux:8::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream AUS (v.8.4)","defaultStatus":"affected","cpes":["cpe:/a:redhat:rhel_aus:8.4::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)","defaultStatus":"affected","cpes":["cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream AUS (v.8.6)","defaultStatus":"affected","cpes":["cpe:/a:redhat:rhel_aus:8.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream E4S (v.8.6)","defaultStatus":"affected","cpes":["cpe:/a:redhat:rhel_e4s:8.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)","defaultStatus":"affected","cpes":["cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream TUS (v.8.6)","defaultStatus":"affected","cpes":["cpe:/a:redhat:rhel_tus:8.6::a
OR
*cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* versions from (including) 9.11.0 up to (including) 9.16.50
*cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* versions from (including) 9.20.0 up to (excluding) 9.20.21
*cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* versions from (including) 9.21.0 up to (excluding) 9.21.20
*cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* versions from (including) 9.18.0 up to (excluding) 9.18.47
Added
Reference Type
CVE: https://lists.debian.org/debian-lts-announce/2026/04/msg00008.html Types: Issue Tracking, Third Party Advisory
Added
Reference Type
Internet Systems Consortium (ISC): https://downloads.isc.org/isc/bind9/9.18.47 Types: Patch
Added
Reference Type
Internet Systems Consortium (ISC): https://downloads.isc.org/isc/bind9/9.20.21 Types: Patch
Added
Reference Type
Internet Systems Consortium (ISC): https://downloads.isc.org/isc/bind9/9.21.20 Types: Patch
Added
Reference Type
Internet Systems Consortium (ISC): https://kb.isc.org/docs/cve-2026-1519 Types: Vendor Advisory
New CVE Received from Internet Systems Consortium (ISC)3/25/2026 10:16:33 AM
Action
Type
Old Value
New Value
Added
Description
If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the resolver may consume excessive CPU. Authoritative-only servers are generally unaffected, although there are circumstances where authoritative servers may make recursive queries (see: https://kb.isc.org/docs/why-does-my-authoritative-server-make-recursive-queries).
This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.46, 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.46-S1, and 9.20.9-S1 through 9.20.20-S1.
Added
CVSS V3.1
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Added
CWE
CWE-606
Added
Reference
https://downloads.isc.org/isc/bind9/9.18.47
Added
Reference
https://downloads.isc.org/isc/bind9/9.20.21
Added
Reference
https://downloads.isc.org/isc/bind9/9.21.20
Added
Reference
https://kb.isc.org/docs/cve-2026-1519
Quick Info
CVE Dictionary Entry: CVE-2026-1519 NVD
Published Date: 03/25/2026 NVD
Last Modified: 07/03/2026
Source: Internet Systems Consortium (ISC)
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