CVE-2023-33285: 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.

Patch / fix

fixed in 1 distros 8

qt qt 5.15.4, 6.2.9, 6.5.1

debian ubuntu red hat suse opensuse almalinux rocky linux azure linux

qt6-base Debian 14, Debian 13, Debian 12 6.4.2+dfsg-10
qtbase-opensource-src Debian 14, Debian 13, Debian 12 5.15.8+dfsg-11
qtbase-opensource-src-gles Debian 14, Debian 13 5.15.10+dfsg-2

debian advisories DEBIAN-CVE-2023-33285

qtbase-opensource-src Ubuntu Pro 16.04 LTS 5.5.1+dfsg-16ubuntu7.7+esm1
qtbase-opensource-src Ubuntu Pro 18.04 LTS 5.9.5+dfsg-0ubuntu2.6+esm1
qtbase-opensource-src Ubuntu Pro 20.04 LTS 5.12.8+dfsg-0ubuntu2.1+esm1
qtbase-opensource-src Ubuntu Pro 22.04 LTS 5.15.3+dfsg-2ubuntu0.2+esm1

ubuntu advisories UBUNTU-CVE-2023-33285

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

qt5-qtbase RHEL 8 5.15.3-5.el8
qt5-qtbase-gui RHEL 8 5.15.3-5.el8
qt5-qtbase-odbc RHEL 8 5.15.3-5.el8
qt5-qtbase-mysql RHEL 8 5.15.3-5.el8
qt5-qtbase-common RHEL 8 5.15.3-5.el8
qt5-qtbase-examples RHEL 8 5.15.3-5.el8
qt5-qtbase-postgresql RHEL 8 5.15.3-5.el8
qt5 RHEL 9 5.15.9-1.el9

red hat advisories RHSA-2023:6967 RHSA-2023:6369

qt6-base SLE Module for Package Hub 15 SP4, openSUSE Leap 15.4 6.2.2-150400.4.6.1
qt6-base SLE Module for Package Hub 15 SP5, SLE Module for Desktop Applications 15 SP5, openSUSE Leap 15.5 6.4.2-150500.3.7.4
libqt5-qtbase SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES 15 SP3-LTSS +8 more 5.12.7-150200.4.23.1
libqt5-qtbase SLE Module for Desktop Applications 15 SP5, SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 5.15.8+kde185-150500.4.8.1
libqt5-qtbase SLE Module for Desktop Applications 15 SP4, SLE Module for Basesystem 15 SP4, openSUSE Leap 15.4 5.15.2+kde294-150400.6.6.1
libqt5-qtbase SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 5.6.2-6.36.1

suse advisories SUSE-SU-2023:3380-1 SUSE-SU-2023:3225-1 SUSE-SU-2023:3207-1 SUSE-SU-2023:3018-1 SUSE-SU-2023:2982-1 SUSE-SU-2023:2971-1

libqt5-qtbase openSUSE Tumbleweed 5.15.10+kde129-1.1
qt6-base openSUSE Tumbleweed 6.6.0-3.1

opensuse advisories openSUSE-SU-2024:13006-1 openSUSE-SU-2024:13380-1

qt5-qtbase AlmaLinux 8 5.15.3-5.el8
qt5-qtbase-gui AlmaLinux 8 5.15.3-5.el8
qt5-qtbase-odbc AlmaLinux 8 5.15.3-5.el8
qt5-qtbase-mysql AlmaLinux 8 5.15.3-5.el8
qt5-qtbase-common AlmaLinux 8 5.15.3-5.el8
qt5-qtbase-examples AlmaLinux 8 5.15.3-5.el8
qt5-qtbase-postgresql AlmaLinux 8 5.15.3-5.el8
qt5 AlmaLinux 9 5.15.9-1.el9

almalinux advisories ALSA-2023:6967 ALSA-2023:6369

qt5 Rocky Linux 9 5.15.9-1.el9
qt5-qtdoc Rocky Linux 9 5.15.9-1.el9
qt5-qtsvg Rocky Linux 9 5.15.9-2.el9
adwaita-qt Rocky Linux 9 1.4.2-1.el9
python-qt5 Rocky Linux 9 5.15.9-1.el9
qt5-qtscript Rocky Linux 9 5.15.9-1.el9
qt5-qtsensors Rocky Linux 9 5.15.9-1.el9
qt5-qtwayland Rocky Linux 9 5.15.9-1.el9

rocky linux advisories RLSA-2023:6369

qt5-qtbase CBL-Mariner 2.0 5.12.11-9

azure linux advisories AZL-26943

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-33285 updated 2026-11-06 cvss 5.3

qt: buffer over-read via a crafted reply from a DNS server

Red Hat CodeReady Linux Builder (v. 8) qt5-qtbase-static 5.15.3-5.el8, qt5-qtbase-debuginfo 5.15.3-5.el8, qt5-qtbase-debugsource 5.15.3-5.el8, qt5-qtbase-gui-debuginfo 5.15.3-5.el8, qt5-qtbase-odbc-debuginfo 5.15.3-5.el8, qt5-qtbase-devel-debuginfo 5.15.3-5.el8, +4 more
fixed: vendor fix RHSA-2023:6967
Red Hat CodeReady Linux Builder (v. 9) qt5-devel 5.15.9-1.el9
fixed: vendor fix RHSA-2023:6369
Red Hat Enterprise Linux AppStream (v. 8) qt5-qtbase 5.15.3-5.el8, qt5-qtbase-gui 5.15.3-5.el8, qt5-qtbase-odbc 5.15.3-5.el8, qt5-qtbase-mysql 5.15.3-5.el8, qt5-qtbase-common 5.15.3-5.el8, qt5-qtbase-examples 5.15.3-5.el8, +1 more
fixed: vendor fix RHSA-2023:6967
Red Hat Enterprise Linux AppStream (v. 9) qt5 5.15.9-1.el9, qt5-rpm-macros 5.15.9-1.el9, qt5-srpm-macros 5.15.9-1.el9
fixed: vendor fix RHSA-2023:6369
Red Hat CodeReady Linux Builder (v. 9) python3-qt5 5.15.9-1.el9 Red Hat Enterprise Linux 6 qt, qt3, qt-x11, qt-odbc, qt-demos, qt-mysql, +10 more Red Hat Enterprise Linux 7 qt, qt3, qt-x11, qt-odbc, qt-qvfb, qt-demos, +12 more Red Hat Enterprise Linux AppStream (v. 9) qt5-qt3d 5.15.9-1.el9, adwaita-qt 1.4.2-1.el9, qt5-qtdoc 5.15.9-1.el9, qt5-qtsvg 5.15.9-2.el9, adwaita-qt5 1.4.2-1.el9, python-qt5 5.15.9-1.el9, +59 more
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 21 mo ago (2025-01-21)

Exploit prediction

0.81% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.3	CVSS:3.1/AC:L/AV:N/A:L/C:N/I:N/PR:N/S:U/UI:N
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Classification

Weakness

CWE-125 Out-of-bounds Read

References

codereview.qt-project.org /c/qt/qtbase/+/477644
vendor-advisory
lists.debian.org /debian-lts-announce/2024/04/msg00027.html
mailing-list

Sources

CVE List CVE-2023-33285
NVD CVE-2023-33285

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary