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High ELSA-2026-93072 4 CVEs

Important: bind9.18 security update (Oracle Linux 9)

Published Oct 30, 2026 · Updated Oct 30, 2026

Ecosystem: Oracle Linux

Summary

[32:9.18.29-14.12]
- Prevent arbitrary code execution via GSS-TSIG UDP message replay
(CVE-2026-94300)
- Fix Denial of service via assertion failure in RPZ query processing (CVE-2026-97313)
- Prevent Denial of Service via assertion failure during redirect processing
(CVE-2026-96888)
- Prevent Denial of Service via unbounded processing of crafted DNS messages
(CVE-2026-19630)

Fixed packages 7

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