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. QDnsLookup has a buffer over-read via a crafted reply from a DNS server.
02 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.
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.81% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 56.5% of scored records. A rank, not a probability.
- NVD base score
- 5.3 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2023-05-22 00:00Z3 YR AGO
- Last updated
- 2025-01-21 15:17Z1 YR AGO
- Reserved
- 2023-05-22
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.3)
- CNA CVSS vector
- CVSS:3.1/AC:L/AV:N/A:L/C:N/I:N/PR:N/S:U/UI:N
- Weaknesses
- Data version
- 5.1
- Document digest
- fe142bded098d4e146e8c4912e83fe5a28fef4bc427ce73b09af0d44109a0226
05 Affected products
06 References
- codereview.qt-project.orghttps://codereview.qt-project.org/c/qt/qtbase/+/477644
- lists.debian.org[debian-lts-announce] 20240430 [SECURITY] [DLA 3805-1] qtbase-opensource-src security updatehttps://lists.debian.org/debian-lts-announce/2024/04/msg00027.html
07 Fixed in
AlmaLinux 8
- qt5-qtbase Fixed in 5.15.3-5.el8
- qt5-qtbase-common Fixed in 5.15.3-5.el8
- qt5-qtbase-devel Fixed in 5.15.3-5.el8
- qt5-qtbase-examples Fixed in 5.15.3-5.el8
- qt5-qtbase-gui Fixed in 5.15.3-5.el8
- qt5-qtbase-mysql Fixed in 5.15.3-5.el8
- qt5-qtbase-odbc Fixed in 5.15.3-5.el8
- qt5-qtbase-postgresql Fixed in 5.15.3-5.el8
- qt5-qtbase-private-devel Fixed in 5.15.3-5.el8
- qt5-qtbase-static Fixed in 5.15.3-5.el8
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- qt5 Fixed in 5.15.9-1.el9
- qt5-devel Fixed in 5.15.9-1.el9
- qt5-qtbase Fixed in 5.15.9-7.el9
- qt5-qtbase-common Fixed in 5.15.9-7.el9
- qt5-qtbase-devel Fixed in 5.15.9-7.el9
- qt5-qtbase-examples Fixed in 5.15.9-7.el9
- qt5-qtbase-gui Fixed in 5.15.9-7.el9
- qt5-qtbase-mysql Fixed in 5.15.9-7.el9
- qt5-qtbase-odbc Fixed in 5.15.9-7.el9
- qt5-qtbase-postgresql Fixed in 5.15.9-7.el9
- qt5-qtbase-private-devel Fixed in 5.15.9-7.el9
- qt5-qtbase-static Fixed in 5.15.9-7.el9
- qt5-rpm-macros Fixed in 5.15.9-1.el9
- qt5-srpm-macros Fixed in 5.15.9-1.el9
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- qt5-qtbase Fixed in 5.15.3-5.el8
- qt5-qtbase-common Fixed in 5.15.3-5.el8
- qt5-qtbase-devel Fixed in 5.15.3-5.el8
- qt5-qtbase-examples Fixed in 5.15.3-5.el8
- qt5-qtbase-gui Fixed in 5.15.3-5.el8
- qt5-qtbase-mysql Fixed in 5.15.3-5.el8
- qt5-qtbase-odbc Fixed in 5.15.3-5.el8
- qt5-qtbase-postgresql Fixed in 5.15.3-5.el8
- qt5-qtbase-private-devel Fixed in 5.15.3-5.el8
- qt5-qtbase-static Fixed in 5.15.3-5.el8
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- qt5 Fixed in 5.15.9-1.el9
- qt5-devel Fixed in 5.15.9-1.el9
- qt5-qtbase Fixed in 5.15.9-7.el9
- qt5-qtbase-common Fixed in 5.15.9-7.el9
- qt5-qtbase-devel Fixed in 5.15.9-7.el9
- qt5-qtbase-examples Fixed in 5.15.9-7.el9
- qt5-qtbase-gui Fixed in 5.15.9-7.el9
- qt5-qtbase-mysql Fixed in 5.15.9-7.el9
- qt5-qtbase-odbc Fixed in 5.15.9-7.el9
- qt5-qtbase-postgresql Fixed in 5.15.9-7.el9
- qt5-qtbase-private-devel Fixed in 5.15.9-7.el9
- qt5-qtbase-static Fixed in 5.15.9-7.el9
- qt5-rpm-macros Fixed in 5.15.9-1.el9
- qt5-srpm-macros Fixed in 5.15.9-1.el9
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- qt6-base Fixed in 6.4.2+dfsg-10
- qtbase-opensource-src Fixed in 5.15.8+dfsg-11
- qtbase-opensource-src-gles No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- qt6-base Fixed in 6.4.2+dfsg-10
- qtbase-opensource-src Fixed in 5.15.8+dfsg-11
- qtbase-opensource-src-gles Fixed in 5.15.10+dfsg-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- qt6-base Fixed in 6.4.2+dfsg-10
- qtbase-opensource-src Fixed in 5.15.8+dfsg-11
- qtbase-opensource-src-gles Fixed in 5.15.10+dfsg-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- qt6-base No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- qt6-base No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- qt6-base No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- qt6-base No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.10
- qt6-base No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 16.04 LTS
- qtbase-opensource-src Fixed in 5.5.1+dfsg-16ubuntu7.7+esm1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- qtbase-opensource-src Fixed in 5.9.5+dfsg-0ubuntu2.6+esm1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 20.04 LTS
- qtbase-opensource-src Fixed in 5.12.8+dfsg-0ubuntu2.1+esm1Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 22.04 LTS
- qtbase-opensource-src Fixed in 5.15.3+dfsg-2ubuntu0.2+esm1Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.