{"id":"USN-6168-2","summary":"libx11 vulnerability","details":"USN-6168-1 fixed a vulnerability in libx11. This update provides\nthe corresponding update for Ubuntu 14.04 ESM, Ubuntu 16.04 ESM,\nand Ubuntu 18.04 ESM.\n\nOriginal advisory details:\n\n Gregory James Duck discovered that libx11 incorrectly handled certain\n Request, Event, or Error IDs. If a user were tricked into connecting to a\n malicious X Server, a remote attacker could possibly use this issue to\n cause libx11 to crash, resulting in a denial of service.\n","modified":"2026-02-10T04:43:09Z","published":"2023-06-20T10:12:13Z","related":["UBUNTU-CVE-2023-3138"],"upstream":["CVE-2023-3138","UBUNTU-CVE-2023-3138"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6168-2"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-3138"}],"affected":[{"package":{"name":"libx11","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/libx11@2:1.6.2-1ubuntu2.1+esm3?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.6.2-1ubuntu2.1+esm3"}]}],"versions":["2:1.6.1-1ubuntu1","2:1.6.1-1ubuntu2","2:1.6.2-1ubuntu1","2:1.6.2-1ubuntu2","2:1.6.2-1ubuntu2.1","2:1.6.2-1ubuntu2.1+esm1","2:1.6.2-1ubuntu2.1+esm2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"libx11-6","binary_version":"2:1.6.2-1ubuntu2.1+esm3"},{"binary_name":"libx11-data","binary_version":"2:1.6.2-1ubuntu2.1+esm3"},{"binary_name":"libx11-dev","binary_version":"2:1.6.2-1ubuntu2.1+esm3"},{"binary_name":"libx11-xcb-dev","binary_version":"2:1.6.2-1ubuntu2.1+esm3"},{"binary_name":"libx11-xcb1","binary_version":"2:1.6.2-1ubuntu2.1+esm3"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2023-3138","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:Pro:14.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6168-2.json"}},{"package":{"name":"libx11","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/libx11@2:1.6.3-1ubuntu2.2+esm2?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.6.3-1ubuntu2.2+esm2"}]}],"versions":["2:1.6.3-1ubuntu2","2:1.6.3-1ubuntu2.1","2:1.6.3-1ubuntu2.2","2:1.6.3-1ubuntu2.2+esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"libx11-6","binary_version":"2:1.6.3-1ubuntu2.2+esm2"},{"binary_name":"libx11-data","binary_version":"2:1.6.3-1ubuntu2.2+esm2"},{"binary_name":"libx11-dev","binary_version":"2:1.6.3-1ubuntu2.2+esm2"},{"binary_name":"libx11-xcb-dev","binary_version":"2:1.6.3-1ubuntu2.2+esm2"},{"binary_name":"libx11-xcb1","binary_version":"2:1.6.3-1ubuntu2.2+esm2"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2023-3138","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:Pro:16.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6168-2.json"}},{"package":{"name":"libx11","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/libx11@2:1.6.4-3ubuntu0.4+esm1?arch=source&distro=esm-infra/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.6.4-3ubuntu0.4+esm1"}]}],"versions":["2:1.6.4-3","2:1.6.4-3ubuntu0.1","2:1.6.4-3ubuntu0.2","2:1.6.4-3ubuntu0.3","2:1.6.4-3ubuntu0.4"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"libx11-6","binary_version":"2:1.6.4-3ubuntu0.4+esm1"},{"binary_name":"libx11-data","binary_version":"2:1.6.4-3ubuntu0.4+esm1"},{"binary_name":"libx11-dev","binary_version":"2:1.6.4-3ubuntu0.4+esm1"},{"binary_name":"libx11-xcb-dev","binary_version":"2:1.6.4-3ubuntu0.4+esm1"},{"binary_name":"libx11-xcb1","binary_version":"2:1.6.4-3ubuntu0.4+esm1"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2023-3138","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:Pro:18.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6168-2.json"}}],"schema_version":"1.7.3"}