CVE-2018-15862

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Source
https://nvd.nist.gov/vuln/detail/CVE-2018-15862
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-15862.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2018-15862
Downstream
Related
Published
2018-08-25T21:29:02.373Z
Modified
2025-11-14T07:53:44.361600Z
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

Unchecked NULL pointer usage in LookupModMask in xkbcomp/expr.c in xkbcommon before 0.8.2 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file with invalid virtual modifiers.

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
4e2ee9c3f6050d773f8bbe05bc0edb17f1ff8371

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
xkbcommon-0.8.1

Database specific

vanir_signatures

[
    {
        "source": "https://github.com/xkbcommon/libxkbcommon/commit/4e2ee9c3f6050d773f8bbe05bc0edb17f1ff8371",
        "signature_version": "v1",
        "signature_type": "Line",
        "target": {
            "file": "src/xkbcomp/expr.c"
        },
        "id": "CVE-2018-15862-1f756a73",
        "digest": {
            "line_hashes": [
                "207605293108385811256869450954427532205",
                "161757858347502194683398663803400346794",
                "324306618126749902025397656962861478277",
                "70812620858281766667010722060269493189"
            ],
            "threshold": 0.9
        },
        "deprecated": false
    },
    {
        "source": "https://github.com/xkbcommon/libxkbcommon/commit/4e2ee9c3f6050d773f8bbe05bc0edb17f1ff8371",
        "signature_version": "v1",
        "signature_type": "Function",
        "target": {
            "function": "LookupModMask",
            "file": "src/xkbcomp/expr.c"
        },
        "id": "CVE-2018-15862-8e347297",
        "digest": {
            "length": 576.0,
            "function_hash": "246470118387212733721000661341588445321"
        },
        "deprecated": false
    }
]