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OpenAdvisories
High RHSA-2026:24934 1 CVE

Red Hat Security Advisory: bind9.18 security update

Published Jun 11, 2026 · Updated Oct 9, 2026

Ecosystem: Red Hat

Fixed packages 3

ReleasePackageFixed in
Red Hat · RHEL 9.6 EUS rhel_eus:9.6::appstream bind9.18 32:9.18.29-4.el9_6.3
Red Hat · RHEL 9.6 EUS rhel_eus:9.6::appstream bind9.18-libs 32:9.18.29-4.el9_6.3
Red Hat · RHEL 9.6 EUS rhel_eus:9.6::crb bind9.18-libs 32:9.18.29-4.el9_6.3

Vulnerabilities 1

  • High 7.5
    CVE-2026-1519

    Excessive NSEC3 iterations cause high CPU load during insecure delegation validation

    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 re…

    ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2451305
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_24934.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-1519
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-1519
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-1519
  • article
    https://downloads.isc.org/isc/bind9/9.18.47
  • article
    https://downloads.isc.org/isc/bind9/9.20.21
  • article
    https://downloads.isc.org/isc/bind9/9.21.20
  • article
    https://kb.isc.org/docs/cve-2026-1519