Out-of-bounds Read in Qt
CVE-2021-3481
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (43.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Qt — versions 5.15.1, 6.0.0, 6.0.2
- Qt — versions Fixed in qt 5.12.11, qt 5.15.4, qt 6.0.3, qt 6.1.0RC.
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugreports.qt.io/browse/QTBUG-91507 (Exploit, Vendor Advisory)
- codereview.qt-project.org/c/qt/qtsvg/+/337646 (Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- access.redhat.com/security/cve/CVE-2021-3481 (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/08/msg00028.html (mailing-list)
Frequently asked questions
- What is CVE-2021-3481?
- CVE-2021-3481 is a high-severity vulnerability in Qt, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2022-08-22.
- How severe is CVE-2021-3481?
- High severity. CVSS v3 base score is 7.1 out of 10.
- Is CVE-2021-3481 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.