{"id":"UBUNTU-CVE-2016-7943","details":"The XListFonts function in X.org libX11 before 1.6.4 might allow remote X servers to gain privileges via vectors involving length fields, which trigger out-of-bounds write operations.","modified":"2026-01-30T00:36:32.101206Z","published":"2016-12-13T00:00:00Z","related":["USN-3758-1","USN-3758-2"],"upstream":["CVE-2016-7943"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-7943"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2016/10/04/4"},{"type":"REPORT","url":"https://lists.x.org/archives/xorg-announce/2016-October/002720.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3758-2"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3758-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2016-7943"}],"affected":[{"package":{"name":"libx11","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/libx11@2:1.6.2-1ubuntu2.1?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.6.2-1ubuntu2.1"}]}],"versions":["2:1.6.1-1ubuntu1","2:1.6.1-1ubuntu2","2:1.6.2-1ubuntu1","2:1.6.2-1ubuntu2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libx11-6","binary_version":"2:1.6.2-1ubuntu2.1"},{"binary_name":"libx11-data","binary_version":"2:1.6.2-1ubuntu2.1"},{"binary_name":"libx11-dev","binary_version":"2:1.6.2-1ubuntu2.1"},{"binary_name":"libx11-xcb-dev","binary_version":"2:1.6.2-1ubuntu2.1"},{"binary_name":"libx11-xcb1","binary_version":"2:1.6.2-1ubuntu2.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-7943.json"}},{"package":{"name":"libx11","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libx11@2:1.6.3-1ubuntu2.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.6.3-1ubuntu2.1"}]}],"versions":["2:1.6.3-1ubuntu2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libx11-6","binary_version":"2:1.6.3-1ubuntu2.1"},{"binary_name":"libx11-data","binary_version":"2:1.6.3-1ubuntu2.1"},{"binary_name":"libx11-dev","binary_version":"2:1.6.3-1ubuntu2.1"},{"binary_name":"libx11-xcb-dev","binary_version":"2:1.6.3-1ubuntu2.1"},{"binary_name":"libx11-xcb1","binary_version":"2:1.6.3-1ubuntu2.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-7943.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"low"}]}