RHSA-2026:99746HighCVSS 7.5

Red Hat Security Advisory: qt5-qtbase security update

Published
November 12, 2026
Last Modified
November 12, 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 products76

  • Red Hat Enterprise Linux Server (v. 7 ELS)
  • Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • qt5-qtbase-0:5.9.7-6.el7_9.1.i686 as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-0:5.9.7-6.el7_9.1.ppc as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-0:5.9.7-6.el7_9.1.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-0:5.9.7-6.el7_9.1.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-0:5.9.7-6.el7_9.1.s390 as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-0:5.9.7-6.el7_9.1.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-0:5.9.7-6.el7_9.1.src as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-0:5.9.7-6.el7_9.1.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-common-0:5.9.7-6.el7_9.1.noarch as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-debuginfo-0:5.9.7-6.el7_9.1.i686 as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-debuginfo-0:5.9.7-6.el7_9.1.i686 as a component of Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • qt5-qtbase-debuginfo-0:5.9.7-6.el7_9.1.ppc as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-debuginfo-0:5.9.7-6.el7_9.1.ppc as a component of Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • qt5-qtbase-debuginfo-0:5.9.7-6.el7_9.1.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-debuginfo-0:5.9.7-6.el7_9.1.ppc64 as a component of Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • qt5-qtbase-debuginfo-0:5.9.7-6.el7_9.1.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-debuginfo-0:5.9.7-6.el7_9.1.ppc64le as a component of Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • qt5-qtbase-debuginfo-0:5.9.7-6.el7_9.1.s390 as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-debuginfo-0:5.9.7-6.el7_9.1.s390 as a component of Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • qt5-qtbase-debuginfo-0:5.9.7-6.el7_9.1.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-debuginfo-0:5.9.7-6.el7_9.1.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • qt5-qtbase-debuginfo-0:5.9.7-6.el7_9.1.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-debuginfo-0:5.9.7-6.el7_9.1.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • qt5-qtbase-devel-0:5.9.7-6.el7_9.1.i686 as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-devel-0:5.9.7-6.el7_9.1.ppc as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-devel-0:5.9.7-6.el7_9.1.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-devel-0:5.9.7-6.el7_9.1.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • qt5-qtbase-devel-0:5.9.7-6.el7_9.1.s390 as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • +46 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)