NULL Pointer Dereference Affecting xkbcomp package, versions <1.5.0-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-ALPINE319-XKBCOMP-14186460
- published5 Dec 2025
- disclosed25 Aug 2018
Introduced: 25 Aug 2018
CVE-2018-15861 (opens in a new tab)How to fix?
Upgrade Alpine:3.19 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:3.19 relevant fixed versions and status.
Unchecked NULL pointer usage 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 that triggers an xkb_intern_atom failure.
References
- https://access.redhat.com/errata/RHSA-2019:2079
- https://github.com/xkbcommon/libxkbcommon/commit/38e1766bc6e20108948aec8a0b222a4bad0254e9
- https://lists.freedesktop.org/archives/wayland-devel/2018-August/039243.html
- https://security.gentoo.org/glsa/201810-05
- https://usn.ubuntu.com/3786-1/
- https://usn.ubuntu.com/3786-2/