{"id":"USN-5193-1","summary":"xorg-server, xorg-server-hwe-18.04, xwayland vulnerabilities","details":"Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled\ncertain inputs. An attacker could use this issue to cause the server to\ncrash, resulting in a denial of service, or possibly execute arbitrary\ncode and escalate privileges.\n","modified":"2026-04-22T10:19:45.411051Z","published":"2021-12-14T18:13:20Z","related":["UBUNTU-CVE-2021-4008","UBUNTU-CVE-2021-4009","UBUNTU-CVE-2021-4010","UBUNTU-CVE-2021-4011"],"upstream":["CVE-2021-4008","CVE-2021-4009","CVE-2021-4010","CVE-2021-4011","UBUNTU-CVE-2021-4008","UBUNTU-CVE-2021-4009","UBUNTU-CVE-2021-4010","UBUNTU-CVE-2021-4011"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5193-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-4008"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-4009"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-4010"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-4011"}],"affected":[{"package":{"name":"xorg-server","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/xorg-server@2:1.19.6-1ubuntu4.10?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.19.6-1ubuntu4.10"}]}],"versions":["2:1.19.5-0ubuntu2","2:1.19.6-1ubuntu1","2:1.19.6-1ubuntu2","2:1.19.6-1ubuntu3","2:1.19.6-1ubuntu4","2:1.19.6-1ubuntu4.1","2:1.19.6-1ubuntu4.2","2:1.19.6-1ubuntu4.3","2:1.19.6-1ubuntu4.4","2:1.19.6-1ubuntu4.5","2:1.19.6-1ubuntu4.6","2:1.19.6-1ubuntu4.7","2:1.19.6-1ubuntu4.8","2:1.19.6-1ubuntu4.9"],"ecosystem_specific":{"binaries":[{"binary_version":"2:1.19.6-1ubuntu4.10","binary_name":"xdmx"},{"binary_version":"2:1.19.6-1ubuntu4.10","binary_name":"xdmx-tools"},{"binary_version":"2:1.19.6-1ubuntu4.10","binary_name":"xmir"},{"binary_version":"2:1.19.6-1ubuntu4.10","binary_name":"xnest"},{"binary_version":"2:1.19.6-1ubuntu4.10","binary_name":"xorg-server-source"},{"binary_version":"2:1.19.6-1ubuntu4.10","binary_name":"xserver-common"},{"binary_version":"2:1.19.6-1ubuntu4.10","binary_name":"xserver-xephyr"},{"binary_version":"2:1.19.6-1ubuntu4.10","binary_name":"xserver-xorg-core"},{"binary_version":"2:1.19.6-1ubuntu4.10","binary_name":"xserver-xorg-legacy"},{"binary_version":"2:1.19.6-1ubuntu4.10","binary_name":"xserver-xorg-xmir"},{"binary_version":"2:1.19.6-1ubuntu4.10","binary_name":"xvfb"},{"binary_version":"2:1.19.6-1ubuntu4.10","binary_name":"xwayland"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5193-1.json","cves_map":{"ecosystem":"Ubuntu:18.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-4008"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-4009"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-4010"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-4011"}]}}},{"package":{"name":"xorg-server-hwe-18.04","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/xorg-server-hwe-18.04@2:1.20.8-2ubuntu2.2~18.04.6?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.20.8-2ubuntu2.2~18.04.6"}]}],"versions":["2:1.20.1-3ubuntu2.1~18.04.1","2:1.20.4-1ubuntu3~18.04.1","2:1.20.5+git20191008-0ubuntu1~18.04.1","2:1.20.8-2ubuntu2.1~18.04.1","2:1.20.8-2ubuntu2.2~18.04.1","2:1.20.8-2ubuntu2.2~18.04.2","2:1.20.8-2ubuntu2.2~18.04.3","2:1.20.8-2ubuntu2.2~18.04.4","2:1.20.8-2ubuntu2.2~18.04.5"],"ecosystem_specific":{"binaries":[{"binary_version":"2:1.20.8-2ubuntu2.2~18.04.6","binary_name":"xorg-server-source-hwe-18.04"},{"binary_version":"2:1.20.8-2ubuntu2.2~18.04.6","binary_name":"xserver-xephyr-hwe-18.04"},{"binary_version":"2:1.20.8-2ubuntu2.2~18.04.6","binary_name":"xserver-xorg-core-hwe-18.04"},{"binary_version":"2:1.20.8-2ubuntu2.2~18.04.6","binary_name":"xserver-xorg-dev-hwe-18.04"},{"binary_version":"2:1.20.8-2ubuntu2.2~18.04.6","binary_name":"xserver-xorg-legacy-hwe-18.04"},{"binary_version":"2:1.20.8-2ubuntu2.2~18.04.6","binary_name":"xwayland-hwe-18.04"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5193-1.json","cves_map":{"ecosystem":"Ubuntu:18.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-4008"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-4009"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-4010"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-4011"}]}}},{"package":{"name":"xorg-server","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/xorg-server@2:1.20.13-1ubuntu1~20.04.2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.20.13-1ubuntu1~20.04.2"}]}],"versions":["2:1.20.5+git20191008-0ubuntu1","2:1.20.6-1ubuntu1","2:1.20.7-2ubuntu1","2:1.20.7-2ubuntu2","2:1.20.8-2ubuntu2","2:1.20.8-2ubuntu2.1","2:1.20.8-2ubuntu2.2","2:1.20.8-2ubuntu2.3","2:1.20.8-2ubuntu2.4","2:1.20.8-2ubuntu2.6","2:1.20.9-2ubuntu1.1~20.04.1","2:1.20.9-2ubuntu1.2~20.04.1","2:1.20.9-2ubuntu1.2~20.04.2","2:1.20.11-1ubuntu1~20.04.2"],"ecosystem_specific":{"binaries":[{"binary_version":"2:1.20.13-1ubuntu1~20.04.2","binary_name":"xdmx"},{"binary_version":"2:1.20.13-1ubuntu1~20.04.2","binary_name":"xdmx-tools"},{"binary_version":"2:1.20.13-1ubuntu1~20.04.2","binary_name":"xnest"},{"binary_version":"2:1.20.13-1ubuntu1~20.04.2","binary_name":"xorg-server-source"},{"binary_version":"2:1.20.13-1ubuntu1~20.04.2","binary_name":"xserver-common"},{"binary_version":"2:1.20.13-1ubuntu1~20.04.2","binary_name":"xserver-xephyr"},{"binary_version":"2:1.20.13-1ubuntu1~20.04.2","binary_name":"xserver-xorg-core"},{"binary_version":"2:1.20.13-1ubuntu1~20.04.2","binary_name":"xserver-xorg-legacy"},{"binary_version":"2:1.20.13-1ubuntu1~20.04.2","binary_name":"xvfb"},{"binary_version":"2:1.20.13-1ubuntu1~20.04.2","binary_name":"xwayland"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5193-1.json","cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-4008"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-4009"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-4010"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-4011"}]}}}],"schema_version":"1.7.5"}