CVE-2018-15861
Published: December 6, 2025Last modified: December 8, 2025
Description
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | xkbcomp | Fixed (1.5.0-r0) |
| 25 LTS | xkbcomp | Fixed (1.5.0-r0) | |
| Stream | xkbcomp | Fixed (1.5.0-r0) |
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/