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High ELSA-2026-94011 5 CVEs

Important: bind9.16 security update (Oracle Linux 8)

Published Nov 2, 2026 · Updated Nov 2, 2026

Ecosystem: Oracle Linux

Summary

[32:9.16.23-0.22.21]
- CVE-2026-94300 bind9.16: bind: Arbitrary code execution via
GSS-TSIG UDP message replay

[32:9.16.23-0.22.20]
- CVE-2026-97313 bind9.16: bind: Denial of service via assertion
failure in RPZ query processing

[32:9.16.23-0.22.19]
- CVE-2026-96888 bind9.16: bind: Denial of Service via assertion failure
during redirect processing

[32:9.16.23-0.22.18]
- CVE-2026-19630 bind9.16: BIND: Denial of Service via unbounded processing of crafted DNS messages
processing of crafted DNS messages

[32:9.16.23-0.22.17]
- Fix CVE-2026-19662: NOQNAME proof use-after-free could crash recursive resolver.

Fixed packages 9

ReleasePackageFixed in
Oracle Linux · 8 bind9.16 32:9.16.23-0.22.el8_10.21
Oracle Linux · 8 bind9.16-chroot 32:9.16.23-0.22.el8_10.21
Oracle Linux · 8 bind9.16-devel 32:9.16.23-0.22.el8_10.21
Oracle Linux · 8 bind9.16-dnssec-utils 32:9.16.23-0.22.el8_10.21
Oracle Linux · 8 bind9.16-doc 32:9.16.23-0.22.el8_10.21
Oracle Linux · 8 bind9.16-libs 32:9.16.23-0.22.el8_10.21
Oracle Linux · 8 bind9.16-license 32:9.16.23-0.22.el8_10.21
Oracle Linux · 8 bind9.16-utils 32:9.16.23-0.22.el8_10.21
Oracle Linux · 8 python3-bind9.16 32:9.16.23-0.22.el8_10.21

Vulnerabilities 5

  • 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-2026-19662

    qpcache NOQNAME proof use-after-free crashes recursive resolver

    An attacker may be able to cause a `named` resolver to abort. The attack requires inducing the victim resolver to send multiple queries for a DNSSEC-signed zone hosted by an authoritative server under the control of the attacker. If the auth responds with a p…

    ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine Wolfi