CVE-2018-15857

HIGH

libxkbcommon < 0.8.1 - Use-After-Free in ExprAppendMultiKeysymList

Title source: llm
STIX 2.1

Description

An invalid free in ExprAppendMultiKeysymList in xkbcomp/ast-build.c in xkbcommon before 0.8.1 could be used by local attackers to crash xkbcommon keymap parsers or possibly have unspecified other impact by supplying a crafted keymap file.

References (6)

Core 6
Core References
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/201810-05
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3786-1/
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3786-2/
Mailing List, Patch, Third Party Advisory x_refsource_misc
https://lists.freedesktop.org/archives/wayland-devel/2018-August/039232.html
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2019:2079

Scores

CVSS v3 7.8
EPSS 0.0006
EPSS Percentile 19.0%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-416
Status published
Products (5)
canonical/ubuntu_linux 14.04
canonical/ubuntu_linux 16.04
canonical/ubuntu_linux 18.04
xkbcommon/libxkbcommon < 0.8.1
xkbcommon/xkbcommon < 0.8.1
Published Aug 25, 2018
Tracked Since Feb 18, 2026