{"id":"UBUNTU-CVE-2018-15857","details":"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.","modified":"2026-02-04T04:29:35.545157Z","published":"2018-08-25T00:00:00Z","related":["USN-3786-1","USN-3786-2"],"upstream":["CVE-2018-15857"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-15857"},{"type":"REPORT","url":"https://lists.freedesktop.org/archives/wayland-devel/2018-August/039232.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3786-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3786-2"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-15857"}],"affected":[{"package":{"name":"libxkbcommon","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/libxkbcommon@0.4.1-0ubuntu1.1?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.1-0ubuntu1.1"}]}],"versions":["0.3.1-1","0.3.1-2","0.4.1-0ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"libxkbcommon-dev","binary_version":"0.4.1-0ubuntu1.1"},{"binary_name":"libxkbcommon-x11-0","binary_version":"0.4.1-0ubuntu1.1"},{"binary_name":"libxkbcommon-x11-dev","binary_version":"0.4.1-0ubuntu1.1"},{"binary_name":"libxkbcommon0","binary_version":"0.4.1-0ubuntu1.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-15857.json"}},{"package":{"name":"libxkbcommon","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libxkbcommon@0.5.0-1ubuntu2.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.5.0-1ubuntu2.1"}]}],"versions":["0.5.0-1ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"libxkbcommon-dev","binary_version":"0.5.0-1ubuntu2.1"},{"binary_name":"libxkbcommon-x11-0","binary_version":"0.5.0-1ubuntu2.1"},{"binary_name":"libxkbcommon-x11-dev","binary_version":"0.5.0-1ubuntu2.1"},{"binary_name":"libxkbcommon0","binary_version":"0.5.0-1ubuntu2.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-15857.json"}},{"package":{"name":"libxkbcommon","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libxkbcommon@0.8.0-1ubuntu0.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.0-1ubuntu0.1"}]}],"versions":["0.7.1-2","0.8.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libxkbcommon-dev","binary_version":"0.8.0-1ubuntu0.1"},{"binary_name":"libxkbcommon-x11-0","binary_version":"0.8.0-1ubuntu0.1"},{"binary_name":"libxkbcommon-x11-dev","binary_version":"0.8.0-1ubuntu0.1"},{"binary_name":"libxkbcommon0","binary_version":"0.8.0-1ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-15857.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}