UBUNTU-CVE-2021-42521

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2021-42521
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-42521.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-42521
Upstream
Published
2022-08-25T18:15:00Z
Modified
2025-10-24T04:50:36Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

There is a NULL pointer dereference vulnerability in VTK before 9.2.5, and it lies in IO/Infovis/vtkXMLTreeReader.cxx. The vendor didn't check the return value of libxml2 API 'xmlDocGetRootElement', and try to dereference it. It is unsafe as the return value can be NULL and that NULL pointer dereference may crash the application.

References

Affected packages

Ubuntu:14.04:LTS

vtk6

Package

Name
vtk6
Purl
pkg:deb/ubuntu/vtk6@6.0.0-6?arch=source&distro=trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

6.*

6.0.0-1
6.0.0-2
6.0.0-3
6.0.0-4
6.0.0-6

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "6.0.0-6",
            "binary_name": "libvtk6"
        },
        {
            "binary_version": "6.0.0-6",
            "binary_name": "libvtk6-dev"
        },
        {
            "binary_version": "6.0.0-6",
            "binary_name": "libvtk6-java"
        },
        {
            "binary_version": "6.0.0-6",
            "binary_name": "python-vtk6"
        },
        {
            "binary_version": "6.0.0-6",
            "binary_name": "tcl-vtk6"
        },
        {
            "binary_version": "6.0.0-6",
            "binary_name": "vtk6"
        },
        {
            "binary_version": "6.0.0-6",
            "binary_name": "vtk6-examples"
        }
    ]
}

Ubuntu:18.04:LTS

vtk6

Package

Name
vtk6
Purl
pkg:deb/ubuntu/vtk6@6.3.0+dfsg1-11build1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

6.*

6.3.0+dfsg1-10build1
6.3.0+dfsg1-10build2
6.3.0+dfsg1-10build3
6.3.0+dfsg1-11
6.3.0+dfsg1-11build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "6.3.0+dfsg1-11build1",
            "binary_name": "libvtk6-dev"
        },
        {
            "binary_version": "6.3.0+dfsg1-11build1",
            "binary_name": "libvtk6-java"
        },
        {
            "binary_version": "6.3.0+dfsg1-11build1",
            "binary_name": "libvtk6-jni"
        },
        {
            "binary_version": "6.3.0+dfsg1-11build1",
            "binary_name": "libvtk6-qt-dev"
        },
        {
            "binary_version": "6.3.0+dfsg1-11build1",
            "binary_name": "libvtk6.3"
        },
        {
            "binary_version": "6.3.0+dfsg1-11build1",
            "binary_name": "libvtk6.3-qt"
        },
        {
            "binary_version": "6.3.0+dfsg1-11build1",
            "binary_name": "python-vtk6"
        },
        {
            "binary_version": "6.3.0+dfsg1-11build1",
            "binary_name": "tcl-vtk6"
        },
        {
            "binary_version": "6.3.0+dfsg1-11build1",
            "binary_name": "vtk6"
        },
        {
            "binary_version": "6.3.0+dfsg1-11build1",
            "binary_name": "vtk6-examples"
        }
    ]
}

vtk7

Package

Name
vtk7
Purl
pkg:deb/ubuntu/vtk7@7.1.1+dfsg1-2?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

7.*

7.1.1+dfsg1-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "7.1.1+dfsg1-2",
            "binary_name": "libvtk7-dev"
        },
        {
            "binary_version": "7.1.1+dfsg1-2",
            "binary_name": "libvtk7-java"
        },
        {
            "binary_version": "7.1.1+dfsg1-2",
            "binary_name": "libvtk7-jni"
        },
        {
            "binary_version": "7.1.1+dfsg1-2",
            "binary_name": "libvtk7-qt-dev"
        },
        {
            "binary_version": "7.1.1+dfsg1-2",
            "binary_name": "libvtk7.1"
        },
        {
            "binary_version": "7.1.1+dfsg1-2",
            "binary_name": "libvtk7.1-qt"
        },
        {
            "binary_version": "7.1.1+dfsg1-2",
            "binary_name": "python3-vtk7"
        },
        {
            "binary_version": "7.1.1+dfsg1-2",
            "binary_name": "tcl-vtk7"
        },
        {
            "binary_version": "7.1.1+dfsg1-2",
            "binary_name": "vtk7"
        },
        {
            "binary_version": "7.1.1+dfsg1-2",
            "binary_name": "vtk7-examples"
        }
    ]
}

Ubuntu:20.04:LTS

vtk6

Package

Name
vtk6
Purl
pkg:deb/ubuntu/vtk6@6.3.0+dfsg2-5build2?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

6.*

6.3.0+dfsg2-2build7
6.3.0+dfsg2-4build1
6.3.0+dfsg2-5
6.3.0+dfsg2-5build1
6.3.0+dfsg2-5build2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "6.3.0+dfsg2-5build2",
            "binary_name": "libvtk6-dev"
        },
        {
            "binary_version": "6.3.0+dfsg2-5build2",
            "binary_name": "libvtk6-qt-dev"
        },
        {
            "binary_version": "6.3.0+dfsg2-5build2",
            "binary_name": "libvtk6.3"
        },
        {
            "binary_version": "6.3.0+dfsg2-5build2",
            "binary_name": "libvtk6.3-qt"
        }
    ]
}

vtk7

Package

Name
vtk7
Purl
pkg:deb/ubuntu/vtk7@7.1.1+dfsg2-2ubuntu1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

7.*

7.1.1+dfsg1-12build2
7.1.1+dfsg2-1
7.1.1+dfsg2-1build1
7.1.1+dfsg2-1ubuntu3
7.1.1+dfsg2-2ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "7.1.1+dfsg2-2ubuntu1",
            "binary_name": "libvtk7-dev"
        },
        {
            "binary_version": "7.1.1+dfsg2-2ubuntu1",
            "binary_name": "libvtk7-java"
        },
        {
            "binary_version": "7.1.1+dfsg2-2ubuntu1",
            "binary_name": "libvtk7-jni"
        },
        {
            "binary_version": "7.1.1+dfsg2-2ubuntu1",
            "binary_name": "libvtk7-qt-dev"
        },
        {
            "binary_version": "7.1.1+dfsg2-2ubuntu1",
            "binary_name": "libvtk7.1p"
        },
        {
            "binary_version": "7.1.1+dfsg2-2ubuntu1",
            "binary_name": "libvtk7.1p-qt"
        },
        {
            "binary_version": "7.1.1+dfsg2-2ubuntu1",
            "binary_name": "python3-vtk7"
        },
        {
            "binary_version": "7.1.1+dfsg2-2ubuntu1",
            "binary_name": "tcl-vtk7"
        },
        {
            "binary_version": "7.1.1+dfsg2-2ubuntu1",
            "binary_name": "vtk7"
        },
        {
            "binary_version": "7.1.1+dfsg2-2ubuntu1",
            "binary_name": "vtk7-examples"
        }
    ]
}

Ubuntu:22.04:LTS

vtk7

Package

Name
vtk7
Purl
pkg:deb/ubuntu/vtk7@7.1.1+dfsg2-10.1build1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

7.*

7.1.1+dfsg2-10
7.1.1+dfsg2-10ubuntu2
7.1.1+dfsg2-10ubuntu3
7.1.1+dfsg2-10.1
7.1.1+dfsg2-10.1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "7.1.1+dfsg2-10.1build1",
            "binary_name": "libvtk7-dev"
        },
        {
            "binary_version": "7.1.1+dfsg2-10.1build1",
            "binary_name": "libvtk7-java"
        },
        {
            "binary_version": "7.1.1+dfsg2-10.1build1",
            "binary_name": "libvtk7-jni"
        },
        {
            "binary_version": "7.1.1+dfsg2-10.1build1",
            "binary_name": "libvtk7-qt-dev"
        },
        {
            "binary_version": "7.1.1+dfsg2-10.1build1",
            "binary_name": "libvtk7.1p"
        },
        {
            "binary_version": "7.1.1+dfsg2-10.1build1",
            "binary_name": "libvtk7.1p-qt"
        },
        {
            "binary_version": "7.1.1+dfsg2-10.1build1",
            "binary_name": "python3-vtk7"
        },
        {
            "binary_version": "7.1.1+dfsg2-10.1build1",
            "binary_name": "tcl-vtk7"
        },
        {
            "binary_version": "7.1.1+dfsg2-10.1build1",
            "binary_name": "vtk7"
        },
        {
            "binary_version": "7.1.1+dfsg2-10.1build1",
            "binary_name": "vtk7-examples"
        }
    ]
}

vtk9

Package

Name
vtk9
Purl
pkg:deb/ubuntu/vtk9@9.1.0+really9.1.0+dfsg2-3build1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

9.*

9.0.1+dfsg1-8
9.1.0+really9.0.3+dfsg1-4
9.1.0+really9.0.3+dfsg1-4build1
9.1.0+really9.1.0+dfsg2-3
9.1.0+really9.1.0+dfsg2-3build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "9.1.0+really9.1.0+dfsg2-3build1",
            "binary_name": "libvtk9-dev"
        },
        {
            "binary_version": "9.1.0+really9.1.0+dfsg2-3build1",
            "binary_name": "libvtk9-java"
        },
        {
            "binary_version": "9.1.0+really9.1.0+dfsg2-3build1",
            "binary_name": "libvtk9-qt-dev"
        },
        {
            "binary_version": "9.1.0+really9.1.0+dfsg2-3build1",
            "binary_name": "libvtk9.1"
        },
        {
            "binary_version": "9.1.0+really9.1.0+dfsg2-3build1",
            "binary_name": "libvtk9.1-qt"
        },
        {
            "binary_version": "9.1.0+really9.1.0+dfsg2-3build1",
            "binary_name": "python3-vtk9"
        },
        {
            "binary_version": "9.1.0+really9.1.0+dfsg2-3build1",
            "binary_name": "vtk9"
        },
        {
            "binary_version": "9.1.0+really9.1.0+dfsg2-3build1",
            "binary_name": "vtk9-examples"
        }
    ]
}

Ubuntu:24.04:LTS

vtk9

Package

Name
vtk9
Purl
pkg:deb/ubuntu/vtk9@9.1.0+really9.1.0+dfsg2-7.1build3?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

9.*

9.1.0+really9.1.0+dfsg2-7
9.1.0+really9.1.0+dfsg2-7build1
9.1.0+really9.1.0+dfsg2-7.1build2
9.1.0+really9.1.0+dfsg2-7.1build3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "9.1.0+really9.1.0+dfsg2-7.1build3",
            "binary_name": "libvtk9-dev"
        },
        {
            "binary_version": "9.1.0+really9.1.0+dfsg2-7.1build3",
            "binary_name": "libvtk9-java"
        },
        {
            "binary_version": "9.1.0+really9.1.0+dfsg2-7.1build3",
            "binary_name": "libvtk9-qt-dev"
        },
        {
            "binary_version": "9.1.0+really9.1.0+dfsg2-7.1build3",
            "binary_name": "libvtk9.1t64"
        },
        {
            "binary_version": "9.1.0+really9.1.0+dfsg2-7.1build3",
            "binary_name": "libvtk9.1t64-qt"
        },
        {
            "binary_version": "9.1.0+really9.1.0+dfsg2-7.1build3",
            "binary_name": "python3-vtk9"
        },
        {
            "binary_version": "9.1.0+really9.1.0+dfsg2-7.1build3",
            "binary_name": "vtk9"
        },
        {
            "binary_version": "9.1.0+really9.1.0+dfsg2-7.1build3",
            "binary_name": "vtk9-examples"
        }
    ]
}

Ubuntu:25.04

vtk9

Package

Name
vtk9
Purl
pkg:deb/ubuntu/vtk9@9.3.0+dfsg1-4ubuntu1?arch=source&distro=plucky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

9.*

9.3.0+dfsg1-1build1
9.3.0+dfsg1-1.1build2
9.3.0+dfsg1-1.1ubuntu2
9.3.0+dfsg1-1.1ubuntu3
9.3.0+dfsg1-4ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "9.3.0+dfsg1-4ubuntu1",
            "binary_name": "libvtk9-dev"
        },
        {
            "binary_version": "9.3.0+dfsg1-4ubuntu1",
            "binary_name": "libvtk9-java"
        },
        {
            "binary_version": "9.3.0+dfsg1-4ubuntu1",
            "binary_name": "libvtk9-qt-dev"
        },
        {
            "binary_version": "9.3.0+dfsg1-4ubuntu1",
            "binary_name": "libvtk9.3"
        },
        {
            "binary_version": "9.3.0+dfsg1-4ubuntu1",
            "binary_name": "libvtk9.3-qt"
        },
        {
            "binary_version": "9.3.0+dfsg1-4ubuntu1",
            "binary_name": "python3-vtk9"
        },
        {
            "binary_version": "9.3.0+dfsg1-4ubuntu1",
            "binary_name": "vtk9"
        },
        {
            "binary_version": "9.3.0+dfsg1-4ubuntu1",
            "binary_name": "vtk9-examples"
        }
    ]
}

Ubuntu:25.10

vtk9

Package

Name
vtk9
Purl
pkg:deb/ubuntu/vtk9@9.3.0+dfsg1-4ubuntu2?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

9.*

9.3.0+dfsg1-4ubuntu1
9.3.0+dfsg1-4ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "9.3.0+dfsg1-4ubuntu2",
            "binary_name": "libvtk9-dev"
        },
        {
            "binary_version": "9.3.0+dfsg1-4ubuntu2",
            "binary_name": "libvtk9-java"
        },
        {
            "binary_version": "9.3.0+dfsg1-4ubuntu2",
            "binary_name": "libvtk9-qt-dev"
        },
        {
            "binary_version": "9.3.0+dfsg1-4ubuntu2",
            "binary_name": "libvtk9.3"
        },
        {
            "binary_version": "9.3.0+dfsg1-4ubuntu2",
            "binary_name": "libvtk9.3-qt"
        },
        {
            "binary_version": "9.3.0+dfsg1-4ubuntu2",
            "binary_name": "python3-vtk9"
        },
        {
            "binary_version": "9.3.0+dfsg1-4ubuntu2",
            "binary_name": "vtk9"
        },
        {
            "binary_version": "9.3.0+dfsg1-4ubuntu2",
            "binary_name": "vtk9-examples"
        }
    ]
}

Ubuntu:Pro:14.04:LTS

vtk

Package

Name
vtk
Purl
pkg:deb/ubuntu/vtk@5.8.0-14.1ubuntu3+esm1?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.8.0-14ubuntu1
5.8.0-14ubuntu3
5.8.0-14.1ubuntu2
5.8.0-14.1ubuntu3
5.8.0-14.1ubuntu3+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "5.8.0-14.1ubuntu3+esm1",
            "binary_name": "libvtk-java"
        },
        {
            "binary_version": "5.8.0-14.1ubuntu3+esm1",
            "binary_name": "libvtk5-dev"
        },
        {
            "binary_version": "5.8.0-14.1ubuntu3+esm1",
            "binary_name": "libvtk5-qt4-dev"
        },
        {
            "binary_version": "5.8.0-14.1ubuntu3+esm1",
            "binary_name": "libvtk5.8"
        },
        {
            "binary_version": "5.8.0-14.1ubuntu3+esm1",
            "binary_name": "libvtk5.8-qt4"
        },
        {
            "binary_version": "5.8.0-14.1ubuntu3+esm1",
            "binary_name": "python-vtk"
        },
        {
            "binary_version": "5.8.0-14.1ubuntu3+esm1",
            "binary_name": "tcl-vtk"
        },
        {
            "binary_version": "5.8.0-14.1ubuntu3+esm1",
            "binary_name": "vtk-examples"
        }
    ]
}

Ubuntu:Pro:16.04:LTS

vtk

Package

Name
vtk
Purl
pkg:deb/ubuntu/vtk@5.10.1+dfsg-2.1ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.10.1+dfsg-2
5.10.1+dfsg-2build3
5.10.1+dfsg-2.1build1
5.10.1+dfsg-2.1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "5.10.1+dfsg-2.1ubuntu0.1~esm1",
            "binary_name": "libvtk-java"
        },
        {
            "binary_version": "5.10.1+dfsg-2.1ubuntu0.1~esm1",
            "binary_name": "libvtk5-dev"
        },
        {
            "binary_version": "5.10.1+dfsg-2.1ubuntu0.1~esm1",
            "binary_name": "libvtk5-qt4-dev"
        },
        {
            "binary_version": "5.10.1+dfsg-2.1ubuntu0.1~esm1",
            "binary_name": "libvtk5.10"
        },
        {
            "binary_version": "5.10.1+dfsg-2.1ubuntu0.1~esm1",
            "binary_name": "libvtk5.10-qt4"
        },
        {
            "binary_version": "5.10.1+dfsg-2.1ubuntu0.1~esm1",
            "binary_name": "python-vtk"
        },
        {
            "binary_version": "5.10.1+dfsg-2.1ubuntu0.1~esm1",
            "binary_name": "tcl-vtk"
        },
        {
            "binary_version": "5.10.1+dfsg-2.1ubuntu0.1~esm1",
            "binary_name": "vtk-examples"
        }
    ]
}

vtk6

Package

Name
vtk6
Purl
pkg:deb/ubuntu/vtk6@6.2.0+dfsg1-10ubuntu0.1+esm1?arch=source&distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

6.*

6.2.0+dfsg1-4ubuntu5
6.2.0+dfsg1-4ubuntu6
6.2.0+dfsg1-8
6.2.0+dfsg1-9
6.2.0+dfsg1-10build1
6.2.0+dfsg1-10ubuntu0.1
6.2.0+dfsg1-10ubuntu0.1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "6.2.0+dfsg1-10ubuntu0.1+esm1",
            "binary_name": "libvtk6-dev"
        },
        {
            "binary_version": "6.2.0+dfsg1-10ubuntu0.1+esm1",
            "binary_name": "libvtk6-java"
        },
        {
            "binary_version": "6.2.0+dfsg1-10ubuntu0.1+esm1",
            "binary_name": "libvtk6-qt-dev"
        },
        {
            "binary_version": "6.2.0+dfsg1-10ubuntu0.1+esm1",
            "binary_name": "libvtk6.2"
        },
        {
            "binary_version": "6.2.0+dfsg1-10ubuntu0.1+esm1",
            "binary_name": "libvtk6.2-qt"
        },
        {
            "binary_version": "6.2.0+dfsg1-10ubuntu0.1+esm1",
            "binary_name": "python-vtk6"
        },
        {
            "binary_version": "6.2.0+dfsg1-10ubuntu0.1+esm1",
            "binary_name": "tcl-vtk6"
        },
        {
            "binary_version": "6.2.0+dfsg1-10ubuntu0.1+esm1",
            "binary_name": "vtk6"
        },
        {
            "binary_version": "6.2.0+dfsg1-10ubuntu0.1+esm1",
            "binary_name": "vtk6-examples"
        }
    ]
}