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OpenAdvisories
High ALAS2023-2026-1533 1 CVE

Important: bind security update (Amazon Linux 2023)

Published Mar 30, 2026 · Updated Apr 1, 2026

Ecosystem: Amazon Linux

Summary

Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2026-1519: 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.

Fixed packages 13

ReleasePackageFixed in
Amazon Linux · 2023 bind 32:9.18.33-1.amzn2023.0.5
Amazon Linux · 2023 bind-chroot 32:9.18.33-1.amzn2023.0.5
Amazon Linux · 2023 bind-debuginfo 32:9.18.33-1.amzn2023.0.5
Amazon Linux · 2023 bind-debugsource 32:9.18.33-1.amzn2023.0.5
Amazon Linux · 2023 bind-devel 32:9.18.33-1.amzn2023.0.5
Amazon Linux · 2023 bind-dnssec-utils 32:9.18.33-1.amzn2023.0.5
Amazon Linux · 2023 bind-dnssec-utils-debuginfo 32:9.18.33-1.amzn2023.0.5
Amazon Linux · 2023 bind-doc 32:9.18.33-1.amzn2023.0.5
Amazon Linux · 2023 bind-libs 32:9.18.33-1.amzn2023.0.5
Amazon Linux · 2023 bind-libs-debuginfo 32:9.18.33-1.amzn2023.0.5
Amazon Linux · 2023 bind-license 32:9.18.33-1.amzn2023.0.5
Amazon Linux · 2023 bind-utils 32:9.18.33-1.amzn2023.0.5
Amazon Linux · 2023 bind-utils-debuginfo 32:9.18.33-1.amzn2023.0.5

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

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-1519.html