{"id":"USN-5638-3","summary":"expat vulnerability","details":"USN-5638-1 fixed a vulnerability in Expat. This update provides\nthe corresponding updates for Ubuntu 16.04 ESM, Ubuntu 18.04 LTS,\nUbuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubuntu 22.10. (CVE-2022-43680)\nThis update also fixes a minor regression introduced in\nUbuntu 18.04 LTS.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n Rhodri James discovered that Expat incorrectly handled memory when\n processing certain malformed XML files. An attacker could possibly\n use this issue to cause a crash or execute arbitrary code.\n","modified":"2026-04-24T09:30:56.074285Z","published":"2022-11-23T15:09:26Z","related":["UBUNTU-CVE-2022-43680"],"upstream":["CVE-2022-43680","UBUNTU-CVE-2022-43680"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5638-3"}],"affected":[{"package":{"name":"expat","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/expat@2.1.0-7ubuntu0.16.04.5+esm7?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.0-7ubuntu0.16.04.5+esm7"}]}],"versions":["2.1.0-7","2.1.0-7ubuntu0.16.04.1","2.1.0-7ubuntu0.16.04.2","2.1.0-7ubuntu0.16.04.3","2.1.0-7ubuntu0.16.04.4","2.1.0-7ubuntu0.16.04.5","2.1.0-7ubuntu0.16.04.5+esm2","2.1.0-7ubuntu0.16.04.5+esm5","2.1.0-7ubuntu0.16.04.5+esm6"],"ecosystem_specific":{"binaries":[{"binary_version":"2.1.0-7ubuntu0.16.04.5+esm7","binary_name":"expat"},{"binary_version":"2.1.0-7ubuntu0.16.04.5+esm7","binary_name":"lib64expat1"},{"binary_version":"2.1.0-7ubuntu0.16.04.5+esm7","binary_name":"libexpat1"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5638-3.json","cves_map":{"ecosystem":"Ubuntu:Pro:16.04:LTS","cves":[]}}},{"package":{"name":"expat","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/expat@2.2.5-3ubuntu0.9?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.5-3ubuntu0.9"}]}],"versions":["2.2.3-1","2.2.3-2","2.2.5-0ubuntu2","2.2.5-3","2.2.5-3ubuntu0.1","2.2.5-3ubuntu0.2","2.2.5-3ubuntu0.4","2.2.5-3ubuntu0.7","2.2.5-3ubuntu0.8"],"ecosystem_specific":{"binaries":[{"binary_version":"2.2.5-3ubuntu0.9","binary_name":"expat"},{"binary_version":"2.2.5-3ubuntu0.9","binary_name":"libexpat1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5638-3.json","cves_map":{"ecosystem":"Ubuntu:18.04:LTS","cves":[]}}},{"package":{"name":"expat","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/expat@2.2.9-1ubuntu0.6?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.9-1ubuntu0.6"}]}],"versions":["2.2.7-2","2.2.9-1","2.2.9-1build1","2.2.9-1ubuntu0.2","2.2.9-1ubuntu0.4","2.2.9-1ubuntu0.5"],"ecosystem_specific":{"binaries":[{"binary_version":"2.2.9-1ubuntu0.6","binary_name":"expat"},{"binary_version":"2.2.9-1ubuntu0.6","binary_name":"libexpat1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5638-3.json","cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[]}}},{"package":{"name":"expat","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/expat@2.4.7-1ubuntu0.2?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.7-1ubuntu0.2"}]}],"versions":["2.4.1-2","2.4.1-3","2.4.2-1","2.4.3-1","2.4.3-2","2.4.4-1","2.4.6-1","2.4.7-1","2.4.7-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.4.7-1ubuntu0.2","binary_name":"expat"},{"binary_version":"2.4.7-1ubuntu0.2","binary_name":"libexpat1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5638-3.json","cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[]}}}],"schema_version":"1.7.5"}