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High ALSA-2026:93072 4 CVEs

Important: bind9.18 security update

Published Oct 30, 2026 · Updated Oct 31, 2026

Ecosystem: AlmaLinux

Summary

BIND (Berkeley Internet Name Domain) is an implementation of the DNS (Domain Name System) protocols. BIND includes a DNS server (named), which resolves host names to IP addresses; a resolver library (routines for applications to use when interfacing with DNS); and tools for verifying that the DNS server is operating properly.

Security Fix(es):

* bind: BIND: Denial of Service via unbounded processing of crafted DNS messages (CVE-2026-19630)
* bind: bind: Arbitrary code execution via GSS-TSIG UDP message replay (CVE-2026-94300)
* bind: bind: Denial of Service via assertion failure during redirect processing (CVE-2026-96888)
* bind: bind: Denial of service via assertion failure in RPZ query processing (CVE-2026-97313)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Fixed packages 7

ReleasePackageFixed in
AlmaLinux · 9 bind9.18 32:9.18.29-14.el9_8.12
AlmaLinux · 9 bind9.18-chroot 32:9.18.29-14.el9_8.12
AlmaLinux · 9 bind9.18-devel 32:9.18.29-14.el9_8.12
AlmaLinux · 9 bind9.18-dnssec-utils 32:9.18.29-14.el9_8.12
AlmaLinux · 9 bind9.18-doc 32:9.18.29-14.el9_8.12
AlmaLinux · 9 bind9.18-libs 32:9.18.29-14.el9_8.12
AlmaLinux · 9 bind9.18-utils 32:9.18.29-14.el9_8.12

Vulnerabilities 4

  • 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

References

  • report
    https://access.redhat.com/security/cve/CVE-2026-19630
  • report
    https://access.redhat.com/security/cve/CVE-2026-94300
  • report
    https://access.redhat.com/security/cve/CVE-2026-96888
  • report
    https://access.redhat.com/security/cve/CVE-2026-97313
  • report
    https://bugzilla.redhat.com/2556406
  • report
    https://bugzilla.redhat.com/2556407
  • report
    https://bugzilla.redhat.com/2556413
  • report
    https://bugzilla.redhat.com/2556415
  • advisory
    https://errata.almalinux.org/9/ALSA-2026-93072.html