UBUNTU-CVE-2018-15856

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Source
https://ubuntu.com/security/CVE-2018-15856
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-15856.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2018-15856
Upstream
Downstream
Related
Published
2018-08-25T00:00:00Z
Modified
2025-09-08T16:45:00Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

An infinite loop when reaching EOL unexpectedly in compose/parser.c (aka the keymap parser) in xkbcommon before 0.8.1 could be used by local attackers to cause a denial of service during parsing of crafted keymap files.

References

Affected packages

Ubuntu:14.04:LTS / libxkbcommon

Package

Name
libxkbcommon
Purl
pkg:deb/ubuntu/libxkbcommon@0.4.1-0ubuntu1.1?arch=source&distro=trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.4.1-0ubuntu1.1

Affected versions

0.*

0.3.1-1
0.3.1-2
0.4.1-0ubuntu1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libxkbcommon-dev",
            "binary_version": "0.4.1-0ubuntu1.1"
        },
        {
            "binary_name": "libxkbcommon-x11-0",
            "binary_version": "0.4.1-0ubuntu1.1"
        },
        {
            "binary_name": "libxkbcommon-x11-dev",
            "binary_version": "0.4.1-0ubuntu1.1"
        },
        {
            "binary_name": "libxkbcommon0",
            "binary_version": "0.4.1-0ubuntu1.1"
        }
    ]
}

Ubuntu:16.04:LTS / libxkbcommon

Package

Name
libxkbcommon
Purl
pkg:deb/ubuntu/libxkbcommon@0.5.0-1ubuntu2.1?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.5.0-1ubuntu2.1

Affected versions

0.*

0.5.0-1ubuntu2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libxkbcommon-dev",
            "binary_version": "0.5.0-1ubuntu2.1"
        },
        {
            "binary_name": "libxkbcommon-x11-0",
            "binary_version": "0.5.0-1ubuntu2.1"
        },
        {
            "binary_name": "libxkbcommon-x11-dev",
            "binary_version": "0.5.0-1ubuntu2.1"
        },
        {
            "binary_name": "libxkbcommon0",
            "binary_version": "0.5.0-1ubuntu2.1"
        }
    ]
}

Ubuntu:18.04:LTS / libxkbcommon

Package

Name
libxkbcommon
Purl
pkg:deb/ubuntu/libxkbcommon@0.8.0-1ubuntu0.1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.8.0-1ubuntu0.1

Affected versions

0.*

0.7.1-2
0.8.0-1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libxkbcommon-dev",
            "binary_version": "0.8.0-1ubuntu0.1"
        },
        {
            "binary_name": "libxkbcommon-x11-0",
            "binary_version": "0.8.0-1ubuntu0.1"
        },
        {
            "binary_name": "libxkbcommon-x11-dev",
            "binary_version": "0.8.0-1ubuntu0.1"
        },
        {
            "binary_name": "libxkbcommon0",
            "binary_version": "0.8.0-1ubuntu0.1"
        }
    ]
}