Description
In Qt before 5.15.15, 6.x before 6.2.9, and 6.3.x through 6.5.x before 6.5.2, there can be an application crash in QXmlStreamReader via a crafted XML string that triggers a situation in which a prefix is greater than a length.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | qt6-base | 6.4.2+dfsg-20 | — |
| Debian 14 | qtbase-opensource-src | 5.15.10+dfsg-3 | — |
| Debian 14 | qtbase-opensource-src-gles | 5.15.10+dfsg-2 | — |
| Debian 13 | qt6-base | 6.4.2+dfsg-20 | — |
| Debian 13 | qtbase-opensource-src | 5.15.10+dfsg-3 | — |
| Debian 13 | qtbase-opensource-src-gles | 5.15.10+dfsg-2 | — |
| Debian 12 | qt6-base +1 | No fix yet | — |
| Debian 12 | qtbase-opensource-src | 5.15.8+dfsg-11+deb12u1 | — |
| Debian 10 | qt4-x11 | 4:4.8.7+dfsg-18+deb10u2 | DLA-3539-1 |
| Debian 10 | qtbase-opensource-src | 5.11.3+dfsg1-1+deb10u6 | DLA-3805-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | qt6-base +1 | No fix yet | — |
| Ubuntu 26.04 LTS | qt6-base +1 | No fix yet | — |
| Ubuntu 25.10 | qt6-base +1 | No fix yet | — |
| Ubuntu 24.04 LTS | qt6-base +1 | No fix yet | — |
| Ubuntu 22.04 LTS | qt6-base +2 | No fix yet | — |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | qtbase-opensource-src-gles | No fix yet | — |
| Ubuntu 18.04 LTS | qt4-x11 | No fix yet | — |
| Ubuntu 16.04 LTS | qt4-x11 +1 | No fix yet | — |
| Ubuntu 14.04 LTS | qt4-x11 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | qtbase-opensource-src | No fix yet | — |
| Ubuntu Pro 18.04 LTS | qtbase-opensource-src | No fix yet | — |
| Ubuntu Pro 16.04 LTS | qtbase-opensource-src | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | qt5 +3 | 5.15.9-1.el9 | RHSA-2023:6369 |
| RHEL 9 | qt5-qtbase +9 | 5.15.9-7.el9 | RHSA-2023:6369 |
| RHEL 8 | qt5-qtbase +9 | 5.15.3-5.el8 | RHSA-2023:6967 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | qt5 +3 | 5.15.9-1.el9 | ALSA-2023:6369 |
| AlmaLinux 9 | qt5-qtbase +9 | 5.15.9-7.el9 | ALSA-2023:6369 |
| AlmaLinux 8 | qt5-qtbase +9 | 5.15.3-5.el8 | ALSA-2023:6967 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | adwaita-qt | 1.4.2-1.el9 | RLSA-2023:6369 |
| Rocky Linux 9 | python-pyqt5-sip | 12.11.1-1.el9.0.1 | RLSA-2023:6369 |
| Rocky Linux 9 | qgnomeplatform | 0.9.0-1.el9 | RLSA-2023:6369 |
| Rocky Linux 9 | qt5 +17 | 5.15.9-1.el9 | RLSA-2023:6369 |
| Rocky Linux 9 | qt5-qtdeclarative | 5.15.9-3.el9 | RLSA-2023:6369 |
| Rocky Linux 9 | qt5-qtsvg +3 | 5.15.9-2.el9 | RLSA-2023:6369 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | libqt5-qtbase | 5.15.8+kde185-150500.4.13.1 | SUSE-SU-2023:4951-1 |
| SLES 15 SP4 | libqt5-qtbase | 5.15.2+kde294-150400.6.10.1 | SUSE-SU-2023:4950-1 |
| SLES 15 SP3 | libqt5-qtbase | 5.12.7-150200.4.29.1 | SUSE-SU-2024:2946-1 |
| SLES 15 SP2 | libqt5-qtbase | 5.12.7-150200.4.29.1 | SUSE-SU-2024:2946-1 |
| SLES 12 SP5 | libqt4 +2 | 4.8.7-8.19.1 | SUSE-SU-2025:02968-1, SUSE-SU-2023:4622-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP3 | libqt5-qtbase | 5.12.7-150200.4.29.1 | SUSE-SU-2024:2946-1 |
| SLES for SAP 15 SP2 | libqt5-qtbase | 5.12.7-150200.4.29.1 | SUSE-SU-2024:2946-1 |
| SLES for SAP 12 SP5 | libqt4 +2 | 4.8.7-8.19.1 | SUSE-SU-2023:4622-1 |
| SLE HPC 15 SP3 | libqt5-qtbase | 5.12.7-150200.4.29.1 | SUSE-SU-2024:2946-1 |
| SLE HPC 15 SP2 | libqt5-qtbase | 5.12.7-150200.4.29.1 | SUSE-SU-2024:2946-1 |
| SUSE Enterprise Storage 7.1 | libqt5-qtbase | 5.12.7-150200.4.29.1 | SUSE-SU-2024:2946-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libqt5-qtbase | 5.15.11+kde138-3.1 | openSUSE-SU-2024:13470-1 |
| openSUSE Tumbleweed | qt6-base | 6.5.2-2.1 | openSUSE-SU-2024:13147-1 |
| openSUSE Leap 15.5 | libqt5-qtbase | 5.15.8+kde185-150500.4.13.1 | SUSE-SU-2023:4951-1 |
| openSUSE Leap 15.4 | libqt5-qtbase | 5.15.2+kde294-150400.6.10.1 | SUSE-SU-2023:4950-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | qt5-qtbase +10 | 5.9.2-3.amzn2.0.14 | ALAS2-2024-2533 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | qt5-qtbase | 5.12.11-9 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | adwaita-qt5 +1 | 1.4.2-1.el9 | ELSA-2023-6369 |
| Oracle Linux 9 | python3-pyqt5-sip | 12.11.1-1.el9 | ELSA-2023-6369 |
| Oracle Linux 9 | qgnomeplatform | 0.9.0-1.el9 | ELSA-2023-6369 |
| Oracle Linux 9 | qt5 +66 | 5.15.9-1.el9 | ELSA-2023-6369 |
| Oracle Linux 9 | qt5-qtbase +9 | 5.15.9-7.el9 | ELSA-2023-6369 |
| Oracle Linux 9 | qt5-qtsvg +11 | 5.15.9-2.el9 | ELSA-2023-6369 |
| Oracle Linux 9 | qt5-qttools +16 | 5.15.9-3.el9 | ELSA-2023-6369 |
| Oracle Linux 8 | qt5-qtbase +9 | 5.15.3-5.el8 | ELSA-2023-6967 |
Advisories 18
- ALSA-2023:6369 Moderate: qt5 security and bug fix update AlmaLinux Security Advisories · Nov 9, 2026
- ALSA-2023:6967 Moderate: qt5-qtbase security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2023:6369 Red Hat Security Advisory: qt5 security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:6967 Red Hat Security Advisory: qt5-qtbase security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RLSA-2023:6369 Moderate: qt5 security and bug fix update Rocky Linux Security Advisories · Jun 25, 2026
- DLA-3539-1 qt4-x11 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3805-1 qtbase-opensource-src - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:13470-1 libQt5Bootstrap-devel-static-32bit-5.15.11+kde138-3.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4622-1 Security update for libqt4 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2946-1 Security update for libqt5-qtbase SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:02968-1 Security update for libqt4 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13147-1 libQt6Concurrent6-6.5.2-2.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4951-1 Security update for libqt5-qtbase SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4950-1 Security update for libqt5-qtbase SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-2066 QT: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Aug 24, 2025
- ALAS2-2024-2533 Important: qt5-qtbase security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Apr 24, 2024
- ELSA-2023-6967 Moderate: qt5-qtbase security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 17, 2023
- ELSA-2023-6369 Moderate: qt5 security and bug fix update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 12, 2023
References
- https://bugreports.qt.io/browse/QTBUG-114829
- https://codereview.qt-project.org/c/qt/qtbase/+/455027
- [debian-lts-announce] 20230822 [SECURITY] [DLA 3539-1] qt4-x11 security update mailing-list
- FEDORA-2023-0e68827d36 vendor-advisory
- FEDORA-2023-fd45b50121 vendor-advisory
- [debian-lts-announce] 20240430 [SECURITY] [DLA 3805-1] qtbase-opensource-src security update mailing-list