CVE-2018-15862 - CVE House
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Status published Medium CVE-2018-15862

Unchecked NULL pointer usage in LookupModMask in xkbcomp/expr.c in xkbcommon...

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from xkbcommon

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CVE-2018-15864
Unchecked NULL pointer usage in resolve_keysym in xkbcomp/parser.y in xkbcommon...
Medium 5.5
CVE-2018-15863
Unchecked NULL pointer usage in ResolveStateAndPredicate in xkbcomp/compat.c in xkbcommon...
Medium 5.5
CVE-2018-15861
Unchecked NULL pointer usage in ExprResolveLhs in xkbcomp/expr.c in xkbcommon...
Medium 5.5
CVE-2018-15859
Unchecked NULL pointer usage when parsing invalid atoms in ExprResolveLhs...
Medium 5.5
CVE-2018-15858
Unchecked NULL pointer usage when handling invalid aliases in CopyKeyAliasesToKeymap...
Medium 5.5

Affected Vendor

Affected Software

libxkbcommon, xkbcommon, ubuntu linux
Vulnerable Versions:
0, 14.04, 16.04, 18.04

Timeline

Official Publish: August 25th, 2018
Last Modified: August 5th, 2024
Added to House: July 20th, 2026

CVSS Vectors

V3: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.