Description
An issue was discovered in Qt 5.x before 5.15.14, 6.x before 6.2.9, and 6.3.x through 6.5.x before 6.5.1. QDnsLookup has a buffer over-read via a crafted reply from a DNS server.
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-10 | — |
| Debian 14 | qtbase-opensource-src | 5.15.8+dfsg-11 | — |
| Debian 14 | qtbase-opensource-src-gles | 5.15.10+dfsg-2 | — |
| Debian 13 | qt6-base | 6.4.2+dfsg-10 | — |
| Debian 13 | qtbase-opensource-src | 5.15.8+dfsg-11 | — |
| Debian 13 | qtbase-opensource-src-gles | 5.15.10+dfsg-2 | — |
| Debian 12 | qt6-base | 6.4.2+dfsg-10 | — |
| Debian 12 | qtbase-opensource-src | 5.15.8+dfsg-11 | — |
| Debian 12 | qtbase-opensource-src-gles | No fix yet | — |
| 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 | No fix yet | — |
| Ubuntu 26.04 LTS | qt6-base | No fix yet | — |
| Ubuntu 25.10 | qt6-base | No fix yet | — |
| Ubuntu 24.04 LTS | qt6-base | No fix yet | — |
| Ubuntu 22.04 LTS | qt6-base | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | qtbase-opensource-src | 5.15.3+dfsg-2ubuntu0.2+esm1 | USN-7780-1 |
| Ubuntu Pro 20.04 LTS | qtbase-opensource-src | 5.12.8+dfsg-0ubuntu2.1+esm1 | USN-7780-1 |
| Ubuntu Pro 18.04 LTS | qtbase-opensource-src | 5.9.5+dfsg-0ubuntu2.6+esm1 | USN-7780-1 |
| Ubuntu Pro 16.04 LTS | qtbase-opensource-src | 5.5.1+dfsg-16ubuntu7.7+esm1 | USN-7780-1 |
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+kde185-150500.4.8.1 | SUSE-SU-2023:3018-1 |
| SLES 15 SP5 | qt6-base | 6.4.2-150500.3.7.4 | SUSE-SU-2023:3225-1 |
| SLES 15 SP4 | libqt5-qtbase | 5.15.2+kde294-150400.6.6.1 | SUSE-SU-2023:2982-1 |
| SLES 15 SP4 | qt6-base | 6.2.2-150400.4.6.1 | SUSE-SU-2023:3380-1 |
| SLES 15 SP3 | libqt5-qtbase | 5.12.7-150200.4.23.1 | SUSE-SU-2023:3207-1 |
| SLES 15 SP2 | libqt5-qtbase | 5.12.7-150200.4.23.1 | SUSE-SU-2023:3207-1 |
| SLES 12 SP5 | libqt5-qtbase | 5.6.2-6.36.1 | SUSE-SU-2023:2971-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP3 | libqt5-qtbase | 5.12.7-150200.4.23.1 | SUSE-SU-2023:3207-1 |
| SLES for SAP 15 SP2 | libqt5-qtbase | 5.12.7-150200.4.23.1 | SUSE-SU-2023:3207-1 |
| SLES for SAP 12 SP5 | libqt5-qtbase | 5.6.2-6.36.1 | SUSE-SU-2023:2971-1 |
| SLE HPC 15 SP3 | libqt5-qtbase | 5.12.7-150200.4.23.1 | SUSE-SU-2023:3207-1 |
| SLE HPC 15 SP2 | libqt5-qtbase | 5.12.7-150200.4.23.1 | SUSE-SU-2023:3207-1 |
| SUSE Manager Server 4.2 | libqt5-qtbase | 5.12.7-150200.4.23.1 | SUSE-SU-2023:3207-1 |
| SUSE Manager Proxy 4.2 | libqt5-qtbase | 5.12.7-150200.4.23.1 | SUSE-SU-2023:3207-1 |
| SUSE Enterprise Storage 7.1 | libqt5-qtbase | 5.12.7-150200.4.23.1 | SUSE-SU-2023:3207-1 |
| SUSE Enterprise Storage 7 | libqt5-qtbase | 5.12.7-150200.4.23.1 | SUSE-SU-2023:3207-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libqt5-qtbase | 5.15.10+kde129-1.1 | openSUSE-SU-2024:13006-1 |
| openSUSE Tumbleweed | qt6-base | 6.6.0-3.1 | openSUSE-SU-2024:13380-1 |
| openSUSE Leap 15.5 | libqt5-qtbase | 5.15.8+kde185-150500.4.8.1 | SUSE-SU-2023:3018-1 |
| openSUSE Leap 15.5 | qt6-base | 6.4.2-150500.3.7.4 | SUSE-SU-2023:3225-1 |
| openSUSE Leap 15.5 | qt6-base-docs | 6.4.2-150500.3.7.1 | SUSE-SU-2023:3225-1 |
| openSUSE Leap 15.4 | libqt5-qtbase | 5.15.2+kde294-150400.6.6.1 | SUSE-SU-2023:2982-1 |
| openSUSE Leap 15.4 | qt6-base +1 | 6.2.2-150400.4.6.1 | SUSE-SU-2023:3380-1 |
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
- USN-7780-1 qtbase-opensource-src vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- RLSA-2023:6369 Moderate: qt5 security and bug fix update Rocky Linux Security Advisories · Jun 25, 2026
- DLA-3805-1 qtbase-opensource-src - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:13006-1 libQt5Bootstrap-devel-static-32bit-5.15.10+kde129-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13380-1 libQt6Concurrent6-6.6.0-3.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3207-1 Security update for libqt5-qtbase SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3380-1 Security update for qt6-base SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2982-1 Security update for libqt5-qtbase SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2971-1 Security update for libqt5-qtbase SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3018-1 Security update for libqt5-qtbase SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-1263 QT: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Sep 28, 2025
- SUSE-SU-2023:3225-1 Security update for qt6-base SUSE / openSUSE Security Updates · May 2, 2025
- 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