{"id":"USN-6168-1","summary":"libx11 vulnerability","details":"Gregory James Duck discovered that libx11 incorrectly handled certain\nRequest, Event, or Error IDs. If a user were tricked into connecting to a\nmalicious X Server, a remote attacker could possibly use this issue to\ncause libx11 to crash, resulting in a denial of service.\n","modified":"2026-04-22T11:01:34.474071Z","published":"2023-06-15T16:51:34Z","related":["UBUNTU-CVE-2023-3138"],"upstream":["CVE-2023-3138","UBUNTU-CVE-2023-3138"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6168-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-3138"}],"affected":[{"package":{"name":"libx11","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libx11@2:1.6.9-2ubuntu1.5?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.6.9-2ubuntu1.5"}]}],"versions":["2:1.6.8-1","2:1.6.9-2","2:1.6.9-2ubuntu1","2:1.6.9-2ubuntu1.1","2:1.6.9-2ubuntu1.2"],"ecosystem_specific":{"binaries":[{"binary_version":"2:1.6.9-2ubuntu1.5","binary_name":"libx11-6"},{"binary_version":"2:1.6.9-2ubuntu1.5","binary_name":"libx11-data"},{"binary_version":"2:1.6.9-2ubuntu1.5","binary_name":"libx11-xcb1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6168-1.json","cves_map":{"cves":[{"id":"CVE-2023-3138","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:20.04:LTS"}}},{"package":{"name":"libx11","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libx11@2:1.7.5-1ubuntu0.2?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.7.5-1ubuntu0.2"}]}],"versions":["2:1.7.2-1","2:1.7.2-2","2:1.7.2-2build1","2:1.7.5-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2:1.7.5-1ubuntu0.2","binary_name":"libx11-6"},{"binary_version":"2:1.7.5-1ubuntu0.2","binary_name":"libx11-data"},{"binary_version":"2:1.7.5-1ubuntu0.2","binary_name":"libx11-xcb1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6168-1.json","cves_map":{"cves":[{"id":"CVE-2023-3138","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:22.04:LTS"}}}],"schema_version":"1.7.5"}