CVE-2021-3481

Name: CVE-2021-3481
Creator: NVD / NIST
Published: 2022-08-22T15:15:13.363+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.1/10EPSS 0.52%

Last modified Jun 17, 2026

CVE-2021-3481 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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. EPSS estimates a 0.52% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.1/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

EPSS Probability

0.52%

39.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Qt	Qt	5.15.1
Qt	Qt	6.0.0
Qt	Qt	6.0.2
Qt	Qt	6.2.0

References

https://access.redhat.com/security/cve/CVE-2021-3481Third Party Advisory
https://bugreports.qt.io/browse/QTBUG-91507Exploit, Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1931444Issue Tracking, Third Party Advisory
https://codereview.qt-project.org/c/qt/qtsvg/+/337646Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/08/msg00028.html
https://access.redhat.com/security/cve/CVE-2021-3481Third Party Advisory
https://bugreports.qt.io/browse/QTBUG-91507Exploit, Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1931444Issue Tracking, Third Party Advisory
https://codereview.qt-project.org/c/qt/qtsvg/+/337646Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/08/msg00028.html

Timeline

Published: Aug 22, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3481?

How severe is CVE-2021-3481?

CVE-2021-3481 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.52% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3481?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-3481?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST