RHSA-2026:72110CriticalCVSS 9.8

Red Hat Security Advisory: unbound security update

Published
September 25, 2026
Last Modified
September 25, 2026

🔗 CVE IDs covered (1)

CVE-2026-81642 →

📋 Description

CVE-2026-81642 — unbound: Unbound: Heap buffer overflow and possible Remote Code Execution when digesting DNSKEY

🎯 Affected products56

  • Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • python3-unbound-0:1.7.3-17.el8_6.8.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • python3-unbound-0:1.7.3-17.el8_6.8.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • python3-unbound-0:1.7.3-17.el8_6.8.s390x as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • python3-unbound-0:1.7.3-17.el8_6.8.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • python3-unbound-0:1.7.3-17.el8_6.8.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • python3-unbound-debuginfo-0:1.7.3-17.el8_6.8.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • python3-unbound-debuginfo-0:1.7.3-17.el8_6.8.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • python3-unbound-debuginfo-0:1.7.3-17.el8_6.8.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • python3-unbound-debuginfo-0:1.7.3-17.el8_6.8.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • python3-unbound-debuginfo-0:1.7.3-17.el8_6.8.s390x as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • python3-unbound-debuginfo-0:1.7.3-17.el8_6.8.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • python3-unbound-debuginfo-0:1.7.3-17.el8_6.8.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • unbound-0:1.7.3-17.el8_6.8.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • unbound-0:1.7.3-17.el8_6.8.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • unbound-0:1.7.3-17.el8_6.8.s390x as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • unbound-0:1.7.3-17.el8_6.8.src as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • unbound-0:1.7.3-17.el8_6.8.src as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • unbound-0:1.7.3-17.el8_6.8.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • unbound-0:1.7.3-17.el8_6.8.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • unbound-debuginfo-0:1.7.3-17.el8_6.8.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • unbound-debuginfo-0:1.7.3-17.el8_6.8.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • unbound-debuginfo-0:1.7.3-17.el8_6.8.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • unbound-debuginfo-0:1.7.3-17.el8_6.8.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • unbound-debuginfo-0:1.7.3-17.el8_6.8.s390x as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • unbound-debuginfo-0:1.7.3-17.el8_6.8.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • unbound-debuginfo-0:1.7.3-17.el8_6.8.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • unbound-debugsource-0:1.7.3-17.el8_6.8.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • unbound-debugsource-0:1.7.3-17.el8_6.8.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • +26 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

🔗 References (4)