NULL Pointer Dereference Affecting xkbcomp package, versions <1.5.0-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.54% (43rd percentile)

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  • Snyk IDSNYK-ALPINE321-XKBCOMP-14186448
  • published5 Dec 2025
  • disclosed25 Aug 2018

Introduced: 25 Aug 2018

CVE-2018-15859  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Alpine:3.21 xkbcomp to version 1.5.0-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xkbcomp package and not the xkbcomp package as distributed by Alpine. See How to fix? for Alpine:3.21 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1