// For flags

CVE-2021-45930

qt: out-of-bounds write may lead to DoS

Severity Score

5.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

3
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Qt SVG in Qt 5.0.0 through 5.15.2 and 6.0.0 through 6.2.1 has an out-of-bounds write in QtPrivate::QCommonArrayOps<QPainterPath::Element>::growAppend (called from QPainterPath::addPath and QPathClipper::intersect).

Qt SVG en Qt versiones 5.0.0 hasta 6.2.1, presenta una escritura fuera de límites en la función QtPrivate::QCommonArrayOps(QPainterPath::Element)::growAppend (llamada desde QPainterPath::addPath y QPathClipper::intersect).

A flaw was found in qtsvg's qsvghandler.cpp module. An attacker who is able to submit a crafted image file to an application that uses qsvghandler could cause an out-of-bounds write and potential denial of service to occur, depending on the application.

Scalable Vector Graphics is an XML-based language for describing two-dimensional vector graphics. Qt provides classes for rendering and displaying SVG drawings in widgets and on other paint devices. Issues addressed include denial of service and out of bounds write vulnerabilities.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-12-31 CVE Reserved
  • 2021-12-31 CVE Published
  • 2024-08-04 CVE Updated
  • 2024-08-04 First Exploit
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-787: Out-of-bounds Write
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Qt
Search vendor "Qt"
 Qtsvg
Search vendor "Qt" for product "Qtsvg"
 >= 5.0.0 <= 5.15.2
Search vendor "Qt" for product "Qtsvg" and version " >= 5.0.0 <= 5.15.2"
-
Affected
Qt
Search vendor "Qt"
 Qtsvg
Search vendor "Qt" for product "Qtsvg"
 >= 6.0.0 <= 6.2.1
Search vendor "Qt" for product "Qtsvg" and version " >= 6.0.0 <= 6.2.1"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 34
Search vendor "Fedoraproject" for product "Fedora" and version "34"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 35
Search vendor "Fedoraproject" for product "Fedora" and version "35"
-
Affected
Debian
Search vendor "Debian"
 Debian Linux
Search vendor "Debian" for product "Debian Linux"
 9.0
Search vendor "Debian" for product "Debian Linux" and version "9.0"
-
Affected