RHSA-2026:95575HighCVSS 7.5

Red Hat Security Advisory: qt5-qtbase security update

Published
November 5, 2026
Last Modified
November 9, 2026

🔗 CVE IDs covered (2)

CVE-2026-11573 →CVE-2026-19248 →

📋 Description

CVE-2026-11573 — qtbase: qt5-qtbase: qt6-qtbase: qtbase: Denial of Service via uncontrolled recursion in XML serialization CVE-2026-19248 — qt5-qtbase: qt6-qtbase: Qt: Denial of Service vulnerability in XML parsing

🎯 Affected products139

  • Red Hat CodeReady Linux Builder EUS (v.9.6)
  • Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • qt5-qtbase-0:5.15.9-11.el9_6.2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • qt5-qtbase-0:5.15.9-11.el9_6.2.i686 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • qt5-qtbase-0:5.15.9-11.el9_6.2.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • qt5-qtbase-0:5.15.9-11.el9_6.2.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • qt5-qtbase-0:5.15.9-11.el9_6.2.src as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • qt5-qtbase-0:5.15.9-11.el9_6.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • qt5-qtbase-common-0:5.15.9-11.el9_6.2.noarch as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_6.2.aarch64 as a component of Red Hat CodeReady Linux Builder EUS (v.9.6)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_6.2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_6.2.i686 as a component of Red Hat CodeReady Linux Builder EUS (v.9.6)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_6.2.i686 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_6.2.ppc64le as a component of Red Hat CodeReady Linux Builder EUS (v.9.6)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_6.2.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_6.2.s390x as a component of Red Hat CodeReady Linux Builder EUS (v.9.6)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_6.2.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_6.2.x86_64 as a component of Red Hat CodeReady Linux Builder EUS (v.9.6)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_6.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_6.2.aarch64 as a component of Red Hat CodeReady Linux Builder EUS (v.9.6)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_6.2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_6.2.i686 as a component of Red Hat CodeReady Linux Builder EUS (v.9.6)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_6.2.i686 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_6.2.ppc64le as a component of Red Hat CodeReady Linux Builder EUS (v.9.6)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_6.2.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_6.2.s390x as a component of Red Hat CodeReady Linux Builder EUS (v.9.6)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_6.2.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_6.2.x86_64 as a component of Red Hat CodeReady Linux Builder EUS (v.9.6)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_6.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • qt5-qtbase-devel-0:5.15.9-11.el9_6.2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • +109 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. 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 (5)