Medium [CVE-2026-10723] Incorrect acceptance of NSEC3 records
This medium-severity Red Hat Linux advisory covers CVE-2026-10723 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support.
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Summary
BIND may accept incorrect child-zone NSEC3 records as valid, which could allow an attacker to forge authenticated NXDOMAIN responses. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.
Exploitation requires high attack complexity, limiting the immediate risk to Red Hat products. Red Hat severity: Moderate — CVSS 6.8 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N).
Weakness: CWE-345.
Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On; and 15 more.
- 9.18.0
- 9.18.50
- 9.20.0
- 9.20.24
- 9.21.0
- 9.21.23
- 9.11.3
- 9.20.9
Official advisory · high-confidence parse· fetched 16 hours ago·verify at source
- bind-32:9.18.33-15.el10_2.10
- bind-32:9.11.4-26.P2.el7_9.21
- bind9.16-32:9.16.23-0.22.el8_10.12
- bind-32:9.11.36-16.el8_10.14
- bind9.16-32:9.16.23-0.7.el8_6.11
- bind9.16-32:9.16.23-0.14.el8_8.9
- bind-32:9.16.23-40.el9_8.8
- bind9.18-32:9.18.29-14.el9_8.8
- bind-32:9.16.23-18.el9_4.12
- bind-32:9.16.23-31.el9_6.4
- openshift/ose-rhel-coreos-9:416.94.202609011112-0
- openshift/ose-rhel-coreos-9:417.94.202609191027-0
- openshift/ose-rhel-coreos-9:418.94.202609031320-0
- openshift/ose-rhel-coreos-9:4.19.9.6.202610241701-0
- openshift/ose-rhel-coreos-9:4.20.9.6.202610242033-0
- openshift/ose-rhel-coreos-9:4.21.9.6.202610241345-0
- openshift/ose-rhel-coreos-9:4.22.9.8.202608251819-0
- bind-main-9.20.26-0.1.hum1
- RHSA-2026:55437
- RHSA-2026:60383
- RHSA-2026:54509
- RHSA-2026:54654
- RHSA-2026:80501
- RHSA-2026:79160
- RHSA-2026:54510
- RHSA-2026:55442
- RHSA-2026:57189
- RHSA-2026:55441
- RHSA-2026:62549
- RHSA-2026:70586
- RHSA-2026:65851
- RHSA-2026:89651
- RHSA-2026:89333
- RHSA-2026:89232
- RHSA-2026:60440
- RHSA-2026:54071
Official advisory · high-confidence parse· fetched 16 hours ago·verify at source
Mitigation
Upgrade to a fixed release: bind-32:9.18.33-15.el10_2.10, bind-32:9.11.4-26.P2.el7_9.21, bind9.16-32:9.16.23-0.22.el8_10.12, bind-32:9.11.36-16.el8_10.14, bind9.16-32:9.16.23-0.7.el8_6.11, bind9.16-32:9.16.23-0.14.el8_8.9. That is the remediation for this advisory.
The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.
Official advisory · high-confidence parse· fetched 16 hours ago·verify at source
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