CVE-2018-15859

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Source
https://nvd.nist.gov/vuln/detail/CVE-2018-15859
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-15859.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2018-15859
Downstream
Related
Published
2018-08-25T21:29:02Z
Modified
2025-09-19T09:25:43.398794Z
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 when parsing invalid atoms in ExprResolveLhs 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, because lookup failures are mishandled.

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
bb4909d2d8fa6b08155e449986a478101e2b2634

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": [
        {
            "id": "CVE-2018-15859-2f44810f",
            "signature_type": "Function",
            "digest": {
                "function_hash": "43341503883219008790151130644987806371",
                "length": 787.0
            },
            "target": {
                "file": "src/xkbcomp/expr.c",
                "function": "ExprResolveLhs"
            },
            "deprecated": false,
            "signature_version": "v1",
            "source": "https://github.com/xkbcommon/libxkbcommon/commit/bb4909d2d8fa6b08155e449986a478101e2b2634"
        },
        {
            "id": "CVE-2018-15859-f8fabfcf",
            "signature_type": "Line",
            "digest": {
                "line_hashes": [
                    "303975513241189271169043459495378179633",
                    "57047408033659113269292648207627675083",
                    "137636030080933030529451911402325404101",
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                    "217681883777450005324145042871811942865",
                    "134258757998295990486982799137584684993"
                ],
                "threshold": 0.9
            },
            "target": {
                "file": "src/xkbcomp/expr.c"
            },
            "deprecated": false,
            "signature_version": "v1",
            "source": "https://github.com/xkbcommon/libxkbcommon/commit/bb4909d2d8fa6b08155e449986a478101e2b2634"
        }
    ]
}