{"id":"USN-8022-1","summary":"expat vulnerabilities","details":"It was discovered that Expat incorrectly handled memory when parsing certain\nXML files. An attacker could possibly use this issue to cause a denial of\nservice. This issue was only addressed in Ubuntu 25.10. (CVE-2025-59375)\n\nIt was discovered that Expat incorrectly handled the initialization of parsers\nfor external entities. An attacker could possibly use this issue to cause a\ndenial of service. (CVE-2026-24515)\n\nIt was discovered that Expat incorrectly handled integer calculations when\nallocating memory for XML tags. An attacker could possibly use this issue to\ncause a denial of service or execute arbitrary code. (CVE-2026-25210)","modified":"2026-04-27T17:59:34.071257Z","published":"2026-02-10T15:26:23Z","related":["UBUNTU-CVE-2025-59375","UBUNTU-CVE-2026-24515","UBUNTU-CVE-2026-25210"],"upstream":["CVE-2025-59375","CVE-2026-24515","CVE-2026-25210","UBUNTU-CVE-2025-59375","UBUNTU-CVE-2026-24515","UBUNTU-CVE-2026-25210"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8022-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-59375"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-24515"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-25210"}],"affected":[{"package":{"name":"expat","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/expat@2.1.0-4ubuntu1.4+esm11?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.0-4ubuntu1.4+esm11"}]}],"versions":["2.1.0-4","2.1.0-4ubuntu1","2.1.0-4ubuntu1.1","2.1.0-4ubuntu1.2","2.1.0-4ubuntu1.3","2.1.0-4ubuntu1.4","2.1.0-4ubuntu1.4+esm1","2.1.0-4ubuntu1.4+esm2","2.1.0-4ubuntu1.4+esm4","2.1.0-4ubuntu1.4+esm6","2.1.0-4ubuntu1.4+esm7","2.1.0-4ubuntu1.4+esm8","2.1.0-4ubuntu1.4+esm9","2.1.0-4ubuntu1.4+esm10"],"ecosystem_specific":{"binaries":[{"binary_version":"2.1.0-4ubuntu1.4+esm11","binary_name":"expat"},{"binary_version":"2.1.0-4ubuntu1.4+esm11","binary_name":"lib64expat1"},{"binary_version":"2.1.0-4ubuntu1.4+esm11","binary_name":"libexpat1"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8022-1.json","cves_map":{"cves":[{"id":"CVE-2026-24515","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-25210","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:Pro:14.04:LTS"}}},{"package":{"name":"expat","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/expat@2.1.0-7ubuntu0.16.04.5+esm11?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.0-7ubuntu0.16.04.5+esm11"}]}],"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","2.1.0-7ubuntu0.16.04.5+esm7","2.1.0-7ubuntu0.16.04.5+esm8","2.1.0-7ubuntu0.16.04.5+esm9","2.1.0-7ubuntu0.16.04.5+esm10"],"ecosystem_specific":{"binaries":[{"binary_version":"2.1.0-7ubuntu0.16.04.5+esm11","binary_name":"expat"},{"binary_version":"2.1.0-7ubuntu0.16.04.5+esm11","binary_name":"lib64expat1"},{"binary_version":"2.1.0-7ubuntu0.16.04.5+esm11","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-8022-1.json","cves_map":{"cves":[{"id":"CVE-2026-24515","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-25210","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:Pro:16.04:LTS"}}},{"package":{"name":"expat","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/expat@2.2.5-3ubuntu0.9+esm3?arch=source&distro=esm-infra/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.5-3ubuntu0.9+esm3"}]}],"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","2.2.5-3ubuntu0.9","2.2.5-3ubuntu0.9+esm1","2.2.5-3ubuntu0.9+esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"2.2.5-3ubuntu0.9+esm3","binary_name":"expat"},{"binary_version":"2.2.5-3ubuntu0.9+esm3","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-8022-1.json","cves_map":{"cves":[{"id":"CVE-2026-24515","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-25210","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:Pro:18.04:LTS"}}},{"package":{"name":"expat","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/expat@2.2.9-1ubuntu0.8+esm1?arch=source&distro=esm-infra/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.9-1ubuntu0.8+esm1"}]}],"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","2.2.9-1ubuntu0.6","2.2.9-1ubuntu0.7","2.2.9-1ubuntu0.8"],"ecosystem_specific":{"binaries":[{"binary_version":"2.2.9-1ubuntu0.8+esm1","binary_name":"expat"},{"binary_version":"2.2.9-1ubuntu0.8+esm1","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-8022-1.json","cves_map":{"cves":[{"id":"CVE-2026-24515","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-25210","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:Pro:20.04:LTS"}}},{"package":{"name":"expat","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/expat@2.4.7-1ubuntu0.7?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.7-1ubuntu0.7"}]}],"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","2.4.7-1ubuntu0.2","2.4.7-1ubuntu0.3","2.4.7-1ubuntu0.4","2.4.7-1ubuntu0.5","2.4.7-1ubuntu0.6"],"ecosystem_specific":{"binaries":[{"binary_version":"2.4.7-1ubuntu0.7","binary_name":"expat"},{"binary_version":"2.4.7-1ubuntu0.7","binary_name":"libexpat1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8022-1.json","cves_map":{"cves":[{"id":"CVE-2026-24515","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-25210","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:22.04:LTS"}}},{"package":{"name":"expat","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/expat@2.7.1-2ubuntu0.2?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.1-2ubuntu0.2"}]}],"versions":["2.7.1-1","2.7.1-2"],"ecosystem_specific":{"binaries":[{"binary_version":"2.7.1-2ubuntu0.2","binary_name":"expat"},{"binary_version":"2.7.1-2ubuntu0.2","binary_name":"libexpat1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8022-1.json","cves_map":{"cves":[{"id":"CVE-2025-59375","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"}]},{"id":"CVE-2026-24515","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-25210","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:25.10"}}}],"schema_version":"1.7.5"}