CVE-2021-3481 Memory corruption in qt
An out-of-bounds read in Qt's SVG rendering allows attackers to access unauthorized memory or crash the application via crafted files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-3481?
CVE-2021-3481 is a high-severity memory corruption vulnerability in Qt Qt, published on 22 Aug 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A flaw was found in Qt. An out-of-bounds read vulnerability was found in QRadialFetchSimd in qt/qtbase/src/gui/painting/qdrawhelper_p.h in Qt/Qtbase. While rendering and displaying a crafted Scalable Vector Graphics (SVG) file this flaw may lead to an unauthorized memory access. The highest threat from this vulnerability is to data confidentiality and the application availability.
Weakness: CWE-125
Which versions are affected by CVE-2021-3481?
It affects 1 product.
Linux distribution packages (40)
adwaita-qt5 AlmaLinux:8 | All versions | 1.2.1-3.el8 |
libadwaita-qt5 AlmaLinux:8 | All versions | 1.2.1-3.el8 |
python-qt5-rpm-macros AlmaLinux:8 | All versions | 5.15.0-2.el8 |
python3-pyqt5-sip AlmaLinux:8 | All versions | 4.19.24-2.el8 |
python3-qt5 AlmaLinux:8 | All versions | 5.15.0-2.el8 |
python3-qt5-base AlmaLinux:8 | All versions | 5.15.0-2.el8 |
python3-qt5-devel AlmaLinux:8 | All versions | 5.15.0-2.el8 |
python3-sip-devel AlmaLinux:8 | All versions | 4.19.24-2.el8 |
python3-wx-siplib AlmaLinux:8 | All versions | 4.19.24-2.el8 |
qgnomeplatform AlmaLinux:8 | All versions | 0.7.1-2.el8 |
qt5-assistant AlmaLinux:8 | All versions | 5.15.2-3.el8 |
qt5-designer AlmaLinux:8 | All versions | 5.15.2-3.el8 |
qt5-devel AlmaLinux:8 | All versions | 5.15.2-1.el8 |
qt5-doctools AlmaLinux:8 | All versions | 5.15.2-3.el8 |
qt5-linguist AlmaLinux:8 | All versions | 5.15.2-3.el8 |
qt5-qdbusviewer AlmaLinux:8 | All versions | 5.15.2-3.el8 |
qt5-qt3d AlmaLinux:8 | All versions | 5.15.2-2.el8 |
qt5-qt3d-devel AlmaLinux:8 | All versions | 5.15.2-2.el8 |
qt5-qt3d-examples AlmaLinux:8 | All versions | 5.15.2-2.el8 |
qt5-qtbase AlmaLinux:8 | All versions | 5.15.2-3.el8 |
qt5-qtbase-common AlmaLinux:8 | All versions | 5.15.2-3.el8 |
qt5-qtbase-devel AlmaLinux:8 | All versions | 5.15.2-3.el8 |
qt5-qtbase-examples AlmaLinux:8 | All versions | 5.15.2-3.el8 |
qt5-qtbase-gui AlmaLinux:8 | All versions | 5.15.2-3.el8 |
qt5-qtbase-mysql AlmaLinux:8 | All versions | 5.15.2-3.el8 |
qt5-qtbase-odbc AlmaLinux:8 | All versions | 5.15.2-3.el8 |
qt5-qtbase-postgresql AlmaLinux:8 | All versions | 5.15.2-3.el8 |
qt5-qtbase-private-devel AlmaLinux:8 | All versions | 5.15.2-3.el8 |
qt5-qtbase-static AlmaLinux:8 | All versions | 5.15.2-3.el8 |
qt5-qtcanvas3d AlmaLinux:8 | All versions | 5.12.5-3.el8 |
qt5-qtcanvas3d-examples AlmaLinux:8 | All versions | 5.12.5-3.el8 |
qt5-qtconnectivity AlmaLinux:8 | All versions | 5.15.2-2.el8 |
qt5-qtconnectivity-devel AlmaLinux:8 | All versions | 5.15.2-2.el8 |
qt5-qtconnectivity-examples AlmaLinux:8 | All versions | 5.15.2-2.el8 |
qt5-qtdeclarative AlmaLinux:8 | All versions | 5.15.2-2.el8 |
qt5-qtdeclarative-devel AlmaLinux:8 | All versions | 5.15.2-2.el8 |
qt5-qtdeclarative-examples AlmaLinux:8 | All versions | 5.15.2-2.el8 |
qt5-qtdeclarative-static AlmaLinux:8 | All versions | 5.15.2-2.el8 |
qt5-qtdoc AlmaLinux:8 | All versions | 5.15.2-1.el8 |
qt5-qtgraphicaleffects AlmaLinux:8 | All versions | 5.15.2-2.el8 |
Products include Qt Qt.
How do I fix CVE-2021-3481?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-3481 being exploited?
There is no known exploitation of CVE-2021-3481 in the wild and no public exploit code.
Other vulnerabilities in Qt Qt
Sources
Also known as ALSA-2021:4172, DEBIAN-CVE-2021-3481, GHSA-jgc8-vf4g-2f67, MGASA-2021-0262, RHSA-2021:4172, RLSA-2021:4172 and 6 more.