High severity7.5NVD Advisory· Published Mar 25, 2026· Updated May 21, 2026
CVE-2026-1519
CVE-2026-1519
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
59- osv-coords58 versionspkg:rpm/almalinux/bindpkg:rpm/almalinux/bind9.16pkg:rpm/almalinux/bind9.16-chrootpkg:rpm/almalinux/bind9.16-develpkg:rpm/almalinux/bind9.16-dnssec-utilspkg:rpm/almalinux/bind9.16-docpkg:rpm/almalinux/bind9.16-libspkg:rpm/almalinux/bind9.16-licensepkg:rpm/almalinux/bind9.16-utilspkg:rpm/almalinux/bind9.18pkg:rpm/almalinux/bind9.18-chrootpkg:rpm/almalinux/bind9.18-develpkg:rpm/almalinux/bind9.18-dnssec-utilspkg:rpm/almalinux/bind9.18-docpkg:rpm/almalinux/bind9.18-libspkg:rpm/almalinux/bind9.18-utilspkg:rpm/almalinux/bind-chrootpkg:rpm/almalinux/bind-develpkg:rpm/almalinux/bind-dnssec-docpkg:rpm/almalinux/bind-dnssec-utilspkg:rpm/almalinux/bind-docpkg:rpm/almalinux/bind-export-develpkg:rpm/almalinux/bind-export-libspkg:rpm/almalinux/bind-libspkg:rpm/almalinux/bind-libs-litepkg:rpm/almalinux/bind-licensepkg:rpm/almalinux/bind-lite-develpkg:rpm/almalinux/bind-pkcs11pkg:rpm/almalinux/bind-pkcs11-develpkg:rpm/almalinux/bind-pkcs11-libspkg:rpm/almalinux/bind-pkcs11-utilspkg:rpm/almalinux/bind-sdbpkg:rpm/almalinux/bind-sdb-chrootpkg:rpm/almalinux/bind-utilspkg:rpm/almalinux/python3-bindpkg:rpm/almalinux/python3-bind9.16pkg:rpm/opensuse/bind&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/bind&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/bind&distro=openSUSE%20Tumbleweedpkg:rpm/suse/bind&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOSpkg:rpm/suse/bind&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSSpkg:rpm/suse/bind&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-ESPOSpkg:rpm/suse/bind&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-LTSSpkg:rpm/suse/bind&distro=SUSE%20Linux%20Enterprise%20Micro%205.5pkg:rpm/suse/bind&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/bind&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP7pkg:rpm/suse/bind&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSSpkg:rpm/suse/bind&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP4-LTSSpkg:rpm/suse/bind&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP5-LTSSpkg:rpm/suse/bind&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg:rpm/suse/bind&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/bind&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP4pkg:rpm/suse/bind&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP5pkg:rpm/suse/bind&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6pkg:rpm/suse/bind&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/bind&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/suse/bind&distro=SUSE%20Manager%20Client%20Tools%20for%20SLE%20Micro%205pkg:rpm/suse/bind&distro=SUSE%20Multi%20Linux%20Manager%20Tools%20SLE-Micro-5
< 32:9.16.23-34.el9_7.2+ 57 more
- (no CPE)range: < 32:9.16.23-34.el9_7.2
- (no CPE)range: < 32:9.16.23-0.22.el8_10.5
- (no CPE)range: < 32:9.16.23-0.22.el8_10.5
- (no CPE)range: < 32:9.16.23-0.22.el8_10.5
- (no CPE)range: < 32:9.16.23-0.22.el8_10.5
- (no CPE)range: < 32:9.16.23-0.22.el8_10.5
- (no CPE)range: < 32:9.16.23-0.22.el8_10.5
- (no CPE)range: < 32:9.16.23-0.22.el8_10.5
- (no CPE)range: < 32:9.16.23-0.22.el8_10.5
- (no CPE)range: < 32:9.18.29-5.el9_7.4
- (no CPE)range: < 32:9.18.29-5.el9_7.4
- (no CPE)range: < 32:9.18.29-5.el9_7.4
- (no CPE)range: < 32:9.18.29-5.el9_7.4
- (no CPE)range: < 32:9.18.29-5.el9_7.4
- (no CPE)range: < 32:9.18.29-5.el9_7.4
- (no CPE)range: < 32:9.18.29-5.el9_7.4
- (no CPE)range: < 32:9.16.23-34.el9_7.2
- (no CPE)range: < 32:9.16.23-34.el9_7.2
- (no CPE)range: < 32:9.16.23-34.el9_7.2
- (no CPE)range: < 32:9.16.23-34.el9_7.2
- (no CPE)range: < 32:9.16.23-34.el9_7.2
- (no CPE)range: < 32:9.11.36-16.el8_10.7
- (no CPE)range: < 32:9.11.36-16.el8_10.7
- (no CPE)range: < 32:9.16.23-34.el9_7.2
- (no CPE)range: < 32:9.11.36-16.el8_10.7
- (no CPE)range: < 32:9.16.23-34.el9_7.2
- (no CPE)range: < 32:9.11.36-16.el8_10.7
- (no CPE)range: < 32:9.11.36-16.el8_10.7
- (no CPE)range: < 32:9.11.36-16.el8_10.7
- (no CPE)range: < 32:9.11.36-16.el8_10.7
- (no CPE)range: < 32:9.11.36-16.el8_10.7
- (no CPE)range: < 32:9.11.36-16.el8_10.7
- (no CPE)range: < 32:9.11.36-16.el8_10.7
- (no CPE)range: < 32:9.16.23-34.el9_7.2
- (no CPE)range: < 32:9.16.23-34.el9_7.2
- (no CPE)range: < 32:9.16.23-0.22.el8_10.5
- (no CPE)range: < 9.18.33-150600.3.21.1
- (no CPE)range: < 9.20.21-160000.1.1
- (no CPE)range: < 9.20.21-1.1
- (no CPE)range: < 9.16.50-150400.5.59.1
- (no CPE)range: < 9.16.50-150400.5.59.1
- (no CPE)range: < 9.16.50-150500.8.35.1
- (no CPE)range: < 9.16.50-150500.8.35.1
- (no CPE)range: < 9.16.50-150500.8.35.1
- (no CPE)range: < 9.20.21-150700.3.18.1
- (no CPE)range: < 9.20.21-150700.3.18.1
- (no CPE)range: < 9.11.22-3.68.1
- (no CPE)range: < 9.16.50-150400.5.59.1
- (no CPE)range: < 9.16.50-150500.8.35.1
- (no CPE)range: < 9.18.33-150600.3.21.1
- (no CPE)range: < 9.20.21-160000.1.1
- (no CPE)range: < 9.16.50-150400.5.59.1
- (no CPE)range: < 9.16.50-150500.8.35.1
- (no CPE)range: < 9.18.33-150600.3.21.1
- (no CPE)range: < 9.20.21-160000.1.1
- (no CPE)range: < 9.11.22-3.68.1
- (no CPE)range: < 9.16.6-150000.12.88.1
- (no CPE)range: < 9.16.6-150000.12.88.1
Patches
Vulnerability mechanics
References
5- downloads.isc.org/isc/bind9/9.18.47nvdPatch
- downloads.isc.org/isc/bind9/9.20.21nvdPatch
- downloads.isc.org/isc/bind9/9.21.20nvdPatch
- kb.isc.org/docs/cve-2026-1519nvdVendor Advisory
- lists.debian.org/debian-lts-announce/2026/04/msg00008.htmlnvdIssue TrackingThird Party Advisory
News mentions
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