Is CVE-2021-3481 in the CISA KEV catalog?

No. CVE-2021-3481 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3481?

CVE-2021-3481 has a CVSS v3 base score of 7.1 (HIGH).

What is the EPSS score for CVE-2021-3481?

CVE-2021-3481 has an EPSS score of 0.51% (40th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3481?

Upgrade qtsvg-opensource-src on debian 11 to 5.15.2-3 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2021-3481

HIGH

7.1

CVSS v3

NVD

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.

CWE-125Out-of-bounds Read

How to fix

Remediation Available

qtsvg-opensource-srcDebian

Fixed in:5.15.2-3CVE-2021-3481

libqt5svg5Ubuntu

Fixed in:5.5.1-2ubuntu0.1~esm1USN-8337-1

Fixed in:5.9.5-0ubuntu1.1+esm1USN-8337-1

Fixed in:5.9.5-0ubuntu1.1USN-5241-1

Fixed in:5.12.8-0ubuntu1+esm1USN-8337-1

Fixed in:5.15.3-1ubuntu0.1~esm1USN-8337-1

qtsvg-opensource-srcUbuntu

Fixed in:5.5.1-2ubuntu0.1~esm1USN-8337-1

Fixed in:5.9.5-0ubuntu1.1USN-5241-1

Fixed in:5.9.5-0ubuntu1.1+esm1USN-8337-1

Fixed in:5.12.8-0ubuntu1+esm1USN-8337-1

Fixed in:5.15.3-1ubuntu0.1~esm1USN-8337-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.51%probability of exploitation in 30 days

40thpercentile

Low risk: more likely to be exploited than 40% of all known CVEs.

References

Exploit1

bugreports.qt.io

Vendor Advisory1

codereview.qt-project.org

Third-Party Advisory2

Other references1

lists.debian.org

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2023-49285	High	8.6	89%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.