UBUNTU-CVE-2020-6838

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2020-6838
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-6838.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-6838
Upstream
Published
2020-01-11T03:15:00Z
Modified
2025-10-24T04:48:18Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

In mruby 2.1.0, there is a use-after-free in hashvaluesat in mrbgems/mruby-hash-ext/src/hash-ext.c.

References

Affected packages

Ubuntu:16.04:LTS

mruby

Package

Name
mruby
Purl
pkg:deb/ubuntu/mruby@1.2.0+20160315+git4f20d58a-1?arch=source&distro=xenial

Affected ranges

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

Affected versions

1.*

1.1.0+20150817+gita1731254-1
1.1.0+20150906+git1cbbb7e1-1
1.2.0+20160315+git4f20d58a-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.2.0+20160315+git4f20d58a-1",
            "binary_name": "libmruby-dev"
        },
        {
            "binary_version": "1.2.0+20160315+git4f20d58a-1",
            "binary_name": "mruby"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-6838.json"

Ubuntu:18.04:LTS

mruby

Package

Name
mruby
Purl
pkg:deb/ubuntu/mruby@1.4.0-1?arch=source&distro=bionic

Affected ranges

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

Affected versions

1.*

1.3.0-1
1.3.0+20170925+git38185028-1
1.3.0+20171029+git77edafb0-1
1.4.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.4.0-1",
            "binary_name": "libmruby-dev"
        },
        {
            "binary_version": "1.4.0-1",
            "binary_name": "mruby"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-6838.json"

Ubuntu:20.04:LTS

mruby

Package

Name
mruby
Purl
pkg:deb/ubuntu/mruby@2.0.0-1?arch=source&distro=focal

Affected ranges

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

Affected versions

2.*

2.0.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.0.0-1",
            "binary_name": "libmruby-dev"
        },
        {
            "binary_version": "2.0.0-1",
            "binary_name": "mruby"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-6838.json"

Ubuntu:22.04:LTS

mruby

Package

Name
mruby
Purl
pkg:deb/ubuntu/mruby@3.0.0-3?arch=source&distro=jammy

Affected ranges

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

Affected versions

2.*

2.1.2-3

3.*

3.0.0-1
3.0.0-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.0.0-3",
            "binary_name": "libmruby-dev"
        },
        {
            "binary_version": "3.0.0-3",
            "binary_name": "mruby"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-6838.json"

Ubuntu:24.04:LTS

mruby

Package

Name
mruby
Purl
pkg:deb/ubuntu/mruby@3.2.0-2?arch=source&distro=noble

Affected ranges

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

Affected versions

3.*

3.2.0-1
3.2.0-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.2.0-2",
            "binary_name": "libmruby-dev"
        },
        {
            "binary_version": "3.2.0-2",
            "binary_name": "mruby"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-6838.json"

Ubuntu:25.04

mruby

Package

Name
mruby
Purl
pkg:deb/ubuntu/mruby@3.3.0-1?arch=source&distro=plucky

Affected ranges

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

Affected versions

3.*

3.3.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.3.0-1",
            "binary_name": "libmruby-dev"
        },
        {
            "binary_version": "3.3.0-1",
            "binary_name": "mruby"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-6838.json"

Ubuntu:25.10

mruby

Package

Name
mruby
Purl
pkg:deb/ubuntu/mruby@3.3.0-1?arch=source&distro=questing

Affected ranges

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

Affected versions

3.*

3.3.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.3.0-1",
            "binary_name": "libmruby-dev"
        },
        {
            "binary_version": "3.3.0-1",
            "binary_name": "mruby"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-6838.json"