CVE-2018-15856

See a problem?
Please try reporting it to the source first.
Source
https://nvd.nist.gov/vuln/detail/CVE-2018-15856
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-15856.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2018-15856
Downstream
Related
Published
2018-08-25T21:29:01Z
Modified
2025-10-14T16:24:34.578641Z
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
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

Git / github.com/xkbcommon/libxkbcommon

Affected ranges

Type
GIT
Repo
https://github.com/xkbcommon/libxkbcommon
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
842e4351c2c97de6051cab6ce36b4a81e709a0e1

Affected versions

xkbcommon-0.*

xkbcommon-0.2.0
xkbcommon-0.3.0
xkbcommon-0.3.1
xkbcommon-0.3.2
xkbcommon-0.4.0
xkbcommon-0.4.1
xkbcommon-0.4.2
xkbcommon-0.4.3
xkbcommon-0.5.0
xkbcommon-0.6.0
xkbcommon-0.6.1
xkbcommon-0.7.0
xkbcommon-0.7.1
xkbcommon-0.7.2
xkbcommon-0.8.0

Database specific 

{
    "vanir_signatures": [
        {
            "signature_version": "v1",
            "signature_type": "Function",
            "target": {
                "file": "src/compose/parser.c",
                "function": "lex"
            },
            "id": "CVE-2018-15856-4feb5e44",
            "digest": {
                "length": 2866.0,
                "function_hash": "111084396536791922603128660627799779023"
            },
            "deprecated": false,
            "source": "https://github.com/xkbcommon/libxkbcommon/commit/842e4351c2c97de6051cab6ce36b4a81e709a0e1"
        },
        {
            "signature_version": "v1",
            "signature_type": "Line",
            "target": {
                "file": "src/compose/parser.c"
            },
            "id": "CVE-2018-15856-72580473",
            "digest": {
                "line_hashes": [
                    "339976281554706251715786465784200783707",
                    "286489673923724958058425891237163149150",
                    "213471127827195187591013137219067204299",
                    "314939995327740885430641703664042403296"
                ],
                "threshold": 0.9
            },
            "deprecated": false,
            "source": "https://github.com/xkbcommon/libxkbcommon/commit/842e4351c2c97de6051cab6ce36b4a81e709a0e1"
        }
    ]
}