RHSA-2026:65993HighCVSS 7.5

Red Hat Security Advisory: qt5-qtbase security update

Published
September 9, 2026
Last Modified
September 28, 2026

🔗 CVE IDs covered (1)

CVE-2026-9499 →

📋 Description

CVE-2026-9499 — qt: Qt: Denial of Service via out-of-bounds read in text codec handling

🎯 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_8.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-0:5.15.9-11.el9_8.1.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-0:5.15.9-11.el9_8.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-0:5.15.9-11.el9_8.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-0:5.15.9-11.el9_8.1.src as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-0:5.15.9-11.el9_8.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-common-0:5.15.9-11.el9_8.1.noarch as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.1.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.1.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.1.i686 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.1.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.1.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debuginfo-0:5.15.9-11.el9_8.1.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.1.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.1.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.1.i686 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.1.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.1.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • qt5-qtbase-debugsource-0:5.15.9-11.el9_8.1.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • qt5-qtbase-devel-0:5.15.9-11.el9_8.1.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: 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)