{"id":"USN-7299-3","aliases":[],"status":"published","title":"xorg-server, xwayland regression","description":"USN-7299-2 fix vulnerabilities in X.Org X Server. This fix caused\nregression in Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. This update\nreverts it pending further investigation.\n\nOriginal advisory details:\n\n Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled\n certain memory operations. An attacker could use these issues to cause the\n X Server to crash, leading to a denial of service, or possibly execute\n arbitrary code.","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2025-03-12T11:54:06Z","modified":"2026-06-25T13:32:30Z","fixes":[{"ecosystem":"Ubuntu:Pro:16.04:LTS","package":"xorg-server","fixed_in":["2:1.18.4-0ubuntu0.12+esm16"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:16.04:LTS","package":"xorg-server-hwe-16.04","fixed_in":["2:1.19.6-1ubuntu4.1~16.04.6+esm8"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:18.04:LTS","package":"xorg-server","fixed_in":["2:1.19.6-1ubuntu4.15+esm11"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:18.04:LTS","package":"xorg-server-hwe-18.04","fixed_in":["2:1.20.8-2ubuntu2.2~18.04.11+esm3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"xorg-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.18.4-0ubuntu0.12+esm16"}]}],"versions":["2:1.17.2-1ubuntu9","2:1.17.2-1ubuntu10","2:1.17.3-2ubuntu1","2:1.17.3-2ubuntu2","2:1.17.3-2ubuntu3","2:1.17.3-2ubuntu4","2:1.18.1-1ubuntu3","2:1.18.1-1ubuntu4","2:1.18.3-1ubuntu1","2:1.18.3-1ubuntu2","2:1.18.3-1ubuntu2.2","2:1.18.3-1ubuntu2.3","2:1.18.4-0ubuntu0.1","2:1.18.4-0ubuntu0.2","2:1.18.4-0ubuntu0.3","2:1.18.4-0ubuntu0.4","2:1.18.4-0ubuntu0.6","2:1.18.4-0ubuntu0.7","2:1.18.4-0ubuntu0.8","2:1.18.4-0ubuntu0.9","2:1.18.4-0ubuntu0.10","2:1.18.4-0ubuntu0.11","2:1.18.4-0ubuntu0.12","2:1.18.4-0ubuntu0.12+esm1","2:1.18.4-0ubuntu0.12+esm2","2:1.18.4-0ubuntu0.12+esm4","2:1.18.4-0ubuntu0.12+esm5","2:1.18.4-0ubuntu0.12+esm6","2:1.18.4-0ubuntu0.12+esm8","2:1.18.4-0ubuntu0.12+esm9","2:1.18.4-0ubuntu0.12+esm10","2:1.18.4-0ubuntu0.12+esm12","2:1.18.4-0ubuntu0.12+esm13","2:1.18.4-0ubuntu0.12+esm14","2:1.18.4-0ubuntu0.12+esm15"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"xorg-server-hwe-16.04","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.19.6-1ubuntu4.1~16.04.6+esm8"}]}],"versions":["2:1.18.4-1ubuntu6.1~16.04.1","2:1.18.4-1ubuntu6.1~16.04.2","2:1.19.3-1ubuntu1~16.04.2","2:1.19.3-1ubuntu1~16.04.3","2:1.19.3-1ubuntu1~16.04.4","2:1.19.5-0ubuntu2~16.04.1","2:1.19.6-1ubuntu4~16.04.1","2:1.19.6-1ubuntu4.1~16.04.1","2:1.19.6-1ubuntu4.1~16.04.2","2:1.19.6-1ubuntu4.1~16.04.3","2:1.19.6-1ubuntu4.1~16.04.4","2:1.19.6-1ubuntu4.1~16.04.5","2:1.19.6-1ubuntu4.1~16.04.6","2:1.19.6-1ubuntu4.1~16.04.6+esm1","2:1.19.6-1ubuntu4.1~16.04.6+esm3","2:1.19.6-1ubuntu4.1~16.04.6+esm4","2:1.19.6-1ubuntu4.1~16.04.6+esm5","2:1.19.6-1ubuntu4.1~16.04.6+esm6","2:1.19.6-1ubuntu4.1~16.04.6+esm7"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"xorg-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.19.6-1ubuntu4.15+esm11"}]}],"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","2:1.19.6-1ubuntu4.10","2:1.19.6-1ubuntu4.11","2:1.19.6-1ubuntu4.12","2:1.19.6-1ubuntu4.13","2:1.19.6-1ubuntu4.14","2:1.19.6-1ubuntu4.15","2:1.19.6-1ubuntu4.15+esm1","2:1.19.6-1ubuntu4.15+esm3","2:1.19.6-1ubuntu4.15+esm4","2:1.19.6-1ubuntu4.15+esm5","2:1.19.6-1ubuntu4.15+esm7","2:1.19.6-1ubuntu4.15+esm8","2:1.19.6-1ubuntu4.15+esm9","2:1.19.6-1ubuntu4.15+esm10"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"xorg-server-hwe-18.04","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.20.8-2ubuntu2.2~18.04.11+esm3"}]}],"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","2:1.20.8-2ubuntu2.2~18.04.6","2:1.20.8-2ubuntu2.2~18.04.7","2:1.20.8-2ubuntu2.2~18.04.8","2:1.20.8-2ubuntu2.2~18.04.9","2:1.20.8-2ubuntu2.2~18.04.10","2:1.20.8-2ubuntu2.2~18.04.11","2:1.20.8-2ubuntu2.2~18.04.11+esm1","2:1.20.8-2ubuntu2.2~18.04.11+esm2"]}],"references":[{"url":"https://ubuntu.com/security/notices/USN-7299-3","tags":["advisory"]},{"url":"https://launchpad.net/bugs/2101897","tags":["report"]}],"sources":{"osv":[{"id":"USN-7299-3","title":"xorg-server, xwayland regression","description":"USN-7299-2 fix vulnerabilities in X.Org X Server. This fix caused\nregression in Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. This update\nreverts it pending further investigation.\n\nOriginal advisory details:\n\n Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled\n certain memory operations. An attacker could use these issues to cause the\n X Server to crash, leading to a denial of service, or possibly execute\n arbitrary code.\n","status":"published","published":"2025-03-12T11:54:06Z","modified":"2026-06-25T13:32:30.225639303Z","updated_at":"2026-11-02T16:58:18.876384Z"}]}}