UBUNTU-CVE-2020-26148

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Source
https://ubuntu.com/security/CVE-2020-26148
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-26148.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-26148
Upstream
Published
2020-09-30T18:15:00Z
Modified
2025-10-24T04:48:47Z
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

mdpushblock_bytes in md4c.c in md4c 0.4.5 allows attackers to trigger use of uninitialized memory, and cause a denial of service (e.g., assertion failure) via a malformed Markdown document.

References

Affected packages

Ubuntu:20.04:LTS / md4c

Package

Name
md4c
Purl
pkg:deb/ubuntu/md4c@0.4.3-1?arch=source&distro=focal

Affected ranges

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

Affected versions

0.*

0.3.4-1
0.4.1-1
0.4.2-1
0.4.3-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.4.3-1",
            "binary_name": "libmd4c-dev"
        },
        {
            "binary_version": "0.4.3-1",
            "binary_name": "libmd4c0"
        }
    ]
}

Ubuntu:22.04:LTS / md4c

Package

Name
md4c
Purl
pkg:deb/ubuntu/md4c@0.4.8-1?arch=source&distro=jammy

Affected ranges

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

Affected versions

0.*

0.4.7-2
0.4.8-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.4.8-1",
            "binary_name": "libmd4c-dev"
        },
        {
            "binary_version": "0.4.8-1",
            "binary_name": "libmd4c-html0"
        },
        {
            "binary_version": "0.4.8-1",
            "binary_name": "libmd4c-html0-dev"
        },
        {
            "binary_version": "0.4.8-1",
            "binary_name": "libmd4c0"
        }
    ]
}

Ubuntu:24.04:LTS / md4c

Package

Name
md4c
Purl
pkg:deb/ubuntu/md4c@0.4.8-1build1?arch=source&distro=noble

Affected ranges

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

Affected versions

0.*

0.4.8-1
0.4.8-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.4.8-1build1",
            "binary_name": "libmd4c-dev"
        },
        {
            "binary_version": "0.4.8-1build1",
            "binary_name": "libmd4c-html0"
        },
        {
            "binary_version": "0.4.8-1build1",
            "binary_name": "libmd4c-html0-dev"
        },
        {
            "binary_version": "0.4.8-1build1",
            "binary_name": "libmd4c0"
        }
    ]
}

Ubuntu:25.10 / md4c

Package

Name
md4c
Purl
pkg:deb/ubuntu/md4c@0.5.2-2?arch=source&distro=questing

Affected ranges

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

Affected versions

0.*

0.5.2-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.5.2-2",
            "binary_name": "libmd4c-dev"
        },
        {
            "binary_version": "0.5.2-2",
            "binary_name": "libmd4c-html0"
        },
        {
            "binary_version": "0.5.2-2",
            "binary_name": "libmd4c-html0-dev"
        },
        {
            "binary_version": "0.5.2-2",
            "binary_name": "libmd4c0"
        },
        {
            "binary_version": "0.5.2-2",
            "binary_name": "md2html"
        }
    ]
}

Ubuntu:25.04 / md4c

Package

Name
md4c
Purl
pkg:deb/ubuntu/md4c@0.5.2-2?arch=source&distro=plucky

Affected ranges

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

Affected versions

0.*

0.4.8-1build1
0.5.2-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.5.2-2",
            "binary_name": "libmd4c-dev"
        },
        {
            "binary_version": "0.5.2-2",
            "binary_name": "libmd4c-html0"
        },
        {
            "binary_version": "0.5.2-2",
            "binary_name": "libmd4c-html0-dev"
        },
        {
            "binary_version": "0.5.2-2",
            "binary_name": "libmd4c0"
        },
        {
            "binary_version": "0.5.2-2",
            "binary_name": "md2html"
        }
    ]
}