RHSA-2026:87082HighCVSS 7.5

Red Hat Security Advisory: qt5-qtbase security update

Published
October 21, 2026
Last Modified
October 22, 2026

🔗 CVE IDs covered (2)

CVE-2026-19248 →CVE-2026-11573 →

📋 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 Enterprise Linux AppStream (v. 9)
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-0:5.15.9-11.el9_8.2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-0:5.15.9-11.el9_8.2.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-0:5.15.9-11.el9_8.2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-0:5.15.9-11.el9_8.2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-0:5.15.9-11.el9_8.2.src as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-0:5.15.9-11.el9_8.2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-common-0:5.15.9-11.el9_8.2.noarch as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.2.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.2.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.2.i686 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.2.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.2.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.2.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.2.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.2.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.2.i686 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.2.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.2.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.2.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-devel-0:5.15.9-11.el9_8.2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • +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)