UBUNTU-CVE-2021-46700

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2021-46700
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-46700.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-46700
Upstream
Published
2022-02-19T19:15:00Z
Modified
2025-10-10T15:01:29Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

In libsixel 1.8.6, sixelencoderoutputwithoutmacro (called from sixelencoderencode_frame in encoder.c) has a double free.

References

Affected packages

Ubuntu:22.04:LTS

libsixel

Package

Name
libsixel
Purl
pkg:deb/ubuntu/libsixel@1.10.3-3?arch=source&distro=jammy

Affected ranges

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

Affected versions

1.*

1.8.6-2
1.10.3-2
1.10.3-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libsixel-bin",
            "binary_version": "1.10.3-3"
        },
        {
            "binary_name": "libsixel-dev",
            "binary_version": "1.10.3-3"
        },
        {
            "binary_name": "libsixel-examples",
            "binary_version": "1.10.3-3"
        },
        {
            "binary_name": "libsixel1",
            "binary_version": "1.10.3-3"
        }
    ]
}

Ubuntu:24.04:LTS

libsixel

Package

Name
libsixel
Purl
pkg:deb/ubuntu/libsixel@1.10.3-3build1?arch=source&distro=noble

Affected ranges

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

Affected versions

1.*

1.10.3-3
1.10.3-3build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libsixel-bin",
            "binary_version": "1.10.3-3build1"
        },
        {
            "binary_name": "libsixel-dev",
            "binary_version": "1.10.3-3build1"
        },
        {
            "binary_name": "libsixel-examples",
            "binary_version": "1.10.3-3build1"
        },
        {
            "binary_name": "libsixel1",
            "binary_version": "1.10.3-3build1"
        }
    ]
}

Ubuntu:25.04

libsixel

Package

Name
libsixel
Purl
pkg:deb/ubuntu/libsixel@1.10.5-1?arch=source&distro=plucky

Affected ranges

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

Affected versions

1.*

1.10.3-3build1
1.10.5-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libsixel-bin",
            "binary_version": "1.10.5-1"
        },
        {
            "binary_name": "libsixel-dev",
            "binary_version": "1.10.5-1"
        },
        {
            "binary_name": "libsixel-examples",
            "binary_version": "1.10.5-1"
        },
        {
            "binary_name": "libsixel1",
            "binary_version": "1.10.5-1"
        }
    ]
}

Ubuntu:25.10

libsixel

Package

Name
libsixel
Purl
pkg:deb/ubuntu/libsixel@1.10.5-1?arch=source&distro=questing

Affected ranges

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

Affected versions

1.*

1.10.5-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libsixel-bin",
            "binary_version": "1.10.5-1"
        },
        {
            "binary_name": "libsixel-dev",
            "binary_version": "1.10.5-1"
        },
        {
            "binary_name": "libsixel-examples",
            "binary_version": "1.10.5-1"
        },
        {
            "binary_name": "libsixel1",
            "binary_version": "1.10.5-1"
        }
    ]
}

Ubuntu:Pro:16.04:LTS

libsixel

Package

Name
libsixel
Purl
pkg:deb/ubuntu/libsixel@1.5.2-2?arch=source&distro=esm-apps/xenial

Affected ranges

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

Affected versions

1.*

1.4.2-1
1.5.2-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libsixel-bin",
            "binary_version": "1.5.2-2"
        },
        {
            "binary_name": "libsixel-dev",
            "binary_version": "1.5.2-2"
        },
        {
            "binary_name": "libsixel1",
            "binary_version": "1.5.2-2"
        }
    ]
}

Ubuntu:Pro:18.04:LTS

libsixel

Package

Name
libsixel
Purl
pkg:deb/ubuntu/libsixel@1.7.3-1?arch=source&distro=esm-apps/bionic

Affected ranges

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

Affected versions

1.*

1.5.2-2
1.7.3-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libsixel-bin",
            "binary_version": "1.7.3-1"
        },
        {
            "binary_name": "libsixel-dev",
            "binary_version": "1.7.3-1"
        },
        {
            "binary_name": "libsixel-examples",
            "binary_version": "1.7.3-1"
        },
        {
            "binary_name": "libsixel1",
            "binary_version": "1.7.3-1"
        }
    ]
}

Ubuntu:Pro:20.04:LTS

libsixel

Package

Name
libsixel
Purl
pkg:deb/ubuntu/libsixel@1.8.2-2.1?arch=source&distro=esm-apps/focal

Affected ranges

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

Affected versions

1.*

1.8.2-1
1.8.2-2.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libsixel-bin",
            "binary_version": "1.8.2-2.1"
        },
        {
            "binary_name": "libsixel-dev",
            "binary_version": "1.8.2-2.1"
        },
        {
            "binary_name": "libsixel-examples",
            "binary_version": "1.8.2-2.1"
        },
        {
            "binary_name": "libsixel1",
            "binary_version": "1.8.2-2.1"
        }
    ]
}