RHSA-2026:84582HighCVSS 7.5

Red Hat Security Advisory: qt6-qtbase security update

Published
October 19, 2026
Last Modified
October 22, 2026

🔗 CVE IDs covered (1)

CVE-2026-11573 →

📋 Description

CVE-2026-11573 — qtbase: qt5-qtbase: qt6-qtbase: qtbase: Denial of Service via uncontrolled recursion in XML serialization

🎯 Affected products112

  • Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
  • qt6-qtbase-0:6.8.1-9.el10_0.1.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • qt6-qtbase-0:6.8.1-9.el10_0.1.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • qt6-qtbase-0:6.8.1-9.el10_0.1.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • qt6-qtbase-0:6.8.1-9.el10_0.1.src as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • qt6-qtbase-0:6.8.1-9.el10_0.1.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • qt6-qtbase-common-0:6.8.1-9.el10_0.1.noarch as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • qt6-qtbase-debuginfo-0:6.8.1-9.el10_0.1.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • qt6-qtbase-debuginfo-0:6.8.1-9.el10_0.1.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
  • qt6-qtbase-debuginfo-0:6.8.1-9.el10_0.1.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • qt6-qtbase-debuginfo-0:6.8.1-9.el10_0.1.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
  • qt6-qtbase-debuginfo-0:6.8.1-9.el10_0.1.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • qt6-qtbase-debuginfo-0:6.8.1-9.el10_0.1.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
  • qt6-qtbase-debuginfo-0:6.8.1-9.el10_0.1.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • qt6-qtbase-debuginfo-0:6.8.1-9.el10_0.1.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
  • qt6-qtbase-debugsource-0:6.8.1-9.el10_0.1.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • qt6-qtbase-debugsource-0:6.8.1-9.el10_0.1.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
  • qt6-qtbase-debugsource-0:6.8.1-9.el10_0.1.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • qt6-qtbase-debugsource-0:6.8.1-9.el10_0.1.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
  • qt6-qtbase-debugsource-0:6.8.1-9.el10_0.1.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • qt6-qtbase-debugsource-0:6.8.1-9.el10_0.1.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
  • qt6-qtbase-debugsource-0:6.8.1-9.el10_0.1.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • qt6-qtbase-debugsource-0:6.8.1-9.el10_0.1.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
  • qt6-qtbase-devel-0:6.8.1-9.el10_0.1.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • qt6-qtbase-devel-0:6.8.1-9.el10_0.1.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • qt6-qtbase-devel-0:6.8.1-9.el10_0.1.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • qt6-qtbase-devel-0:6.8.1-9.el10_0.1.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • qt6-qtbase-devel-debuginfo-0:6.8.1-9.el10_0.1.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • qt6-qtbase-devel-debuginfo-0:6.8.1-9.el10_0.1.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
  • +82 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: To mitigate this issue, applications that use Qt's QDomDocument for XML serialization should avoid processing untrusted XML input. If processing untrusted XML is unavoidable, implement robust input validation and sanitization to prevent deeply nested structures before passing the data to the QtXml component. This requires application-level changes or careful operational procedures to ensure only trusted XML is processed.

🔗 References (4)