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High ALAS2023-2026-3312 6 CVEs

Important: bind security update (Amazon Linux 2023)

Published Oct 26, 2026 · Updated Oct 26, 2026

Ecosystem: Amazon Linux

Summary

Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2026-97313: Named exits on an assertion failure, resulting in denial of service. Affected versions: 9.16.0-9.18.50, 9.20.0-9.20.29. CVE-2026-96888: Named may terminate unexpectedly when a redirect zone is used with strict QNAME minimization (CWE-617). A resolver is only affected when configured with both a redirect zone AND qname-minimization strict. Affected versions: 9.16.0-9.18.50, 9.20.0-9.20.29, 9.21.0-9.21.26. CVE-2026-94300: Replaying GSS-TSIG signed UDP messages can result in memory corruption in named. An attacker who can capture a previously signed UDP message can replay it while the negotiated TSIG key is still valid. By also sending crafted queries to a zone the attacker controls, the attacker may potentially achieve remote code execution. CVE-2026-77119: A validly signed NSEC3 from an unrelated sibling zone may be accepted as an insecurity proof, downgrading a secure delegation and letting a forged unsigned answer through. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1. CVE-2026-19668: A BIND recursive resolver may experience excessive resource consumption if it encounters large numbers of a particular kind of invalid DNSSEC record. Default limits on "max-records-per-type" and "max-types-per-name" help mitigate the exposure. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1. CVE-2026-19630: Inbound-message resource exhaustion (CWE-400) leading to denial of service. No configuration precondition; version applicability is the deciding factor. Affected versions: 9.11.0-9.18.50, 9.20.0-9.20.29, 9.21.0-9.21.26.

Fixed packages 13

ReleasePackageFixed in
Amazon Linux · 2023 bind 32:9.18.50-1.amzn2023.0.5
Amazon Linux · 2023 bind-chroot 32:9.18.50-1.amzn2023.0.5
Amazon Linux · 2023 bind-debuginfo 32:9.18.50-1.amzn2023.0.5
Amazon Linux · 2023 bind-debugsource 32:9.18.50-1.amzn2023.0.5
Amazon Linux · 2023 bind-devel 32:9.18.50-1.amzn2023.0.5
Amazon Linux · 2023 bind-dnssec-utils 32:9.18.50-1.amzn2023.0.5
Amazon Linux · 2023 bind-dnssec-utils-debuginfo 32:9.18.50-1.amzn2023.0.5
Amazon Linux · 2023 bind-doc 32:9.18.50-1.amzn2023.0.5
Amazon Linux · 2023 bind-libs 32:9.18.50-1.amzn2023.0.5
Amazon Linux · 2023 bind-libs-debuginfo 32:9.18.50-1.amzn2023.0.5
Amazon Linux · 2023 bind-license 32:9.18.50-1.amzn2023.0.5
Amazon Linux · 2023 bind-utils 32:9.18.50-1.amzn2023.0.5
Amazon Linux · 2023 bind-utils-debuginfo 32:9.18.50-1.amzn2023.0.5

Vulnerabilities 6

  • High 8.1
    CVE-2026-94300 Public exploit

    Concurrent GSS-TSIG messages corrupt memory

    Replaying GSS-TSIG signed UDP messages can result in memory corruption in "`named`". An attacker who can capture a previously signed UDP message can replay it while the negotiated TSIG key is still valid. By also sending crafted queries to a zone the attacker…

    ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine Wolfi
  • High 7.5
    CVE-2026-19630

    Amplified resource exhaustion in inbound message processing

    In a BIND resolver, inbound DNS protocol messages with a particular structure will result in additional processing, with no limit imposed by BIND. A DNS message with a maliciously large number of such structures will cause BIND to consume disproportionate amo…

    ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine Wolfi
  • High 7.5
    CVE-2026-96888

    Named may terminate unexpectedly when a redirect zone is used with strict QNAME minimization

    A BIND resolver that is configured with both a "redirect" zone and "qname-minimization strict" may abort with an assertion failure while processing the redirect. This issue affects BIND 9 versions 9.16.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through…

    ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine Wolfi
  • High 7.5
    CVE-2026-97313

    Specific RPZ configurations and query patterns may result in an unexpected exit

    A recursive BIND server that receives a query with recursion desired (RD=1) followed by a non-recursive query (RD=0) may exit with an assertion failure, resulting in a denial of service. To be vulnerable, the BIND server must allow recursive queries and have …

    ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine Wolfi
  • Medium 5.9
    CVE-2026-77119

    NSEC3 insecure-referral proof can use unrelated cached NSEC3 RRsets

    A validly signed NSEC3 from an unrelated sibling zone may be accepted as an insecurity proof, downgrading a secure delegation and letting a forged unsigned answer through. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21…

    ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine
  • Medium 5.3
    CVE-2026-19668

    Resource Exhaustion via Excessive DNSSEC Cryptographic Material Matching

    A BIND recursive resolver may experience excessive resource consumption if it encounters large numbers of a particular kind of invalid DNSSEC record. Default limits on "max-records-per-type" and "max-types-per-name" help mitigate the exposure. This issue affe…

    ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine Wolfi

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-19630.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-19668.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-77119.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-94300.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-96888.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-97313.html