CVE-2018-15857

high

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

https://access.redhat.com/errata/RHSA-2019:2079

https://github.com/xkbcommon/libxkbcommon/commit/c1e5ac16e77a21f87bdf3bc4dea61b037a17dddb

https://lists.freedesktop.org/archives/wayland-devel/2018-August/039232.html

https://security.gentoo.org/glsa/201810-05

https://usn.ubuntu.com/3786-1/

https://usn.ubuntu.com/3786-2/

Details

Source: MITRE

Published: 2018-08-25

Updated: 2019-08-06

Type: CWE-416

Risk Information

CVSS v2

Base Score: 4.6

Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3

Base Score: 7.8

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

Impact Score: 5.9

Exploitability Score: 1.8

Severity: HIGH