Описание
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.
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.
Ссылки
- https://nvd.nist.gov/vuln/detail/CVE-2026-1519
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1519.json
- https://lists.debian.org/debian-lts-announce/2026/04/msg00008.html
- https://kb.isc.org/docs/cve-2026-1519
- https://downloads.isc.org/isc/bind9/9.21.20
- https://downloads.isc.org/isc/bind9/9.20.21
- https://downloads.isc.org/isc/bind9/9.18.47
- https://bugzilla.redhat.com/show_bug.cgi?id=2451305
- https://access.redhat.com/security/cve/CVE-2026-1519
- https://access.redhat.com/errata/RHSA-2026:8352
- https://access.redhat.com/errata/RHSA-2026:8312
- https://access.redhat.com/errata/RHSA-2026:8155
- https://access.redhat.com/errata/RHSA-2026:8075
- https://access.redhat.com/errata/RHSA-2026:7915
- https://access.redhat.com/errata/RHSA-2026:6935
- https://access.redhat.com/errata/RHSA-2026:40021
- https://access.redhat.com/errata/RHSA-2026:36610
- https://access.redhat.com/errata/RHSA-2026:34048
- https://access.redhat.com/errata/RHSA-2026:29863
- https://access.redhat.com/errata/RHSA-2026:29110
- https://access.redhat.com/errata/RHSA-2026:25214
- https://access.redhat.com/errata/RHSA-2026:25171
- https://access.redhat.com/errata/RHSA-2026:25083
- https://access.redhat.com/errata/RHSA-2026:24934
- https://access.redhat.com/errata/RHSA-2026:24851
- https://access.redhat.com/errata/RHSA-2026:24500
- https://access.redhat.com/errata/RHSA-2026:16064
- https://access.redhat.com/errata/RHSA-2026:16060
- https://access.redhat.com/errata/RHSA-2026:15890
- https://access.redhat.com/errata/RHSA-2026:11372
- https://access.redhat.com/errata/RHSA-2026:11371
Связанные уязвимости
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.
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.
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.
Excessive NSEC3 iterations cause high CPU load during insecure delegation validation
If a BIND resolver is performing DNSSEC validation and encounters a ma ...