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Advisory severityHigh7.5Red Hat Linux

High [CVE-2026-13204] Unexpected exit with NSEC and NSEC3 both present

This high-severity Red Hat Linux advisory covers CVE-2026-13204 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.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-13204 Source published Source updated

VulniPulse record published Record updated

CVE-2026-13204
Affected products & platforms
Red Hat LinuxRed Hat Enterprise Linux
Open source advisory

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Summary

If a provably insecure domain is covered by both an NSEC and NSEC3 record at the parent, and there exist an RRSIG for only one of these types, then BIND may exit unexpectedly with an assertion while validating this proof. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Weakness: CWE-617.

Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.8 Telecommunications Update Service; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.6 Extended Update Support; Red Hat OpenShift Container Platform 4.22; Red Hat Hardened Images; Red Hat Enterprise Linux 6; Red Hat OpenShift Container Platform 4.

Red Hat lists Red Hat Enterprise Linux 9 as not affected. Red Hat fixing advisory: 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-2026:57362, RHSA-2026:66357, RHSA-2026:54071.

Affected versions
  • 9.11.0
  • 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 12 hours ago·verify at source

Fixed versions
  • 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-9:4.22.9.8.202608191915-0
  • openshift/ose-rhel-coreos-9:4.22.9.8.202609081748-0
  • 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-2026:57362
  • RHSA-2026:66357
  • RHSA-2026:54071

Official advisory · high-confidence parse· fetched 12 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 12 hours ago·verify at source

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