{"id":"USN-8173-1","summary":"policykit-1 vulnerabilities","details":"It was discovered that polkit incorrectly handled nested elements in XML\npolicy files. If an administrator were tricked into installing a malicious\npolicy file, a remote attacker could possibly use this issue to cause\npolkit to crash, resulting in a denial of service. (CVE-2025-7519)\n\nPavel Kohout discovered that the polkit polkit-agent-helper-1 utility\nincorrectly handled long input. A local attacker could possibly use this\nissue to cause polkit to crash, resulting in a denial of service.\n(CVE-2026-4897)","modified":"2026-04-16T11:14:11.073633214Z","published":"2026-04-14T08:02:28Z","related":["UBUNTU-CVE-2025-7519","UBUNTU-CVE-2026-4897"],"upstream":["CVE-2025-7519","CVE-2026-4897","UBUNTU-CVE-2025-7519","UBUNTU-CVE-2026-4897"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8173-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-7519"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-4897"}],"affected":[{"package":{"name":"policykit-1","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/policykit-1@0.105-33ubuntu0.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.105-33ubuntu0.1"}]}],"versions":["0.105-31","0.105-31ubuntu1","0.105-31.1","0.105-32","0.105-33"],"ecosystem_specific":{"binaries":[{"binary_name":"gir1.2-polkit-1.0","binary_version":"0.105-33ubuntu0.1"},{"binary_name":"libpolkit-agent-1-0","binary_version":"0.105-33ubuntu0.1"},{"binary_name":"libpolkit-agent-1-dev","binary_version":"0.105-33ubuntu0.1"},{"binary_name":"libpolkit-gobject-1-0","binary_version":"0.105-33ubuntu0.1"},{"binary_name":"libpolkit-gobject-1-dev","binary_version":"0.105-33ubuntu0.1"},{"binary_name":"pkexec","binary_version":"0.105-33ubuntu0.1"},{"binary_name":"policykit-1","binary_version":"0.105-33ubuntu0.1"},{"binary_name":"polkitd","binary_version":"0.105-33ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[{"id":"CVE-2025-7519","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"low","type":"Ubuntu"}]},{"id":"CVE-2026-4897","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8173-1.json"}},{"package":{"name":"policykit-1","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/policykit-1@124-2ubuntu1.24.04.3?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"124-2ubuntu1.24.04.3"}]}],"versions":["123-1","123-3","124-1","124-1ubuntu1","124-2ubuntu1","124-2ubuntu1.24.04.2"],"ecosystem_specific":{"binaries":[{"binary_name":"gir1.2-polkit-1.0","binary_version":"124-2ubuntu1.24.04.3"},{"binary_name":"libpolkit-agent-1-0","binary_version":"124-2ubuntu1.24.04.3"},{"binary_name":"libpolkit-agent-1-dev","binary_version":"124-2ubuntu1.24.04.3"},{"binary_name":"libpolkit-gobject-1-0","binary_version":"124-2ubuntu1.24.04.3"},{"binary_name":"libpolkit-gobject-1-dev","binary_version":"124-2ubuntu1.24.04.3"},{"binary_name":"pkexec","binary_version":"124-2ubuntu1.24.04.3"},{"binary_name":"policykit-1","binary_version":"124-2ubuntu1.24.04.3"},{"binary_name":"polkitd","binary_version":"124-2ubuntu1.24.04.3"},{"binary_name":"polkitd-pkla","binary_version":"124-2ubuntu1.24.04.3"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2025-7519","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"low","type":"Ubuntu"}]},{"id":"CVE-2026-4897","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:24.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8173-1.json"}},{"package":{"name":"policykit-1","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/policykit-1@126-2ubuntu0.1?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"126-2ubuntu0.1"}]}],"versions":["126-2"],"ecosystem_specific":{"binaries":[{"binary_name":"gir1.2-polkit-1.0","binary_version":"126-2ubuntu0.1"},{"binary_name":"libpolkit-agent-1-0","binary_version":"126-2ubuntu0.1"},{"binary_name":"libpolkit-agent-1-dev","binary_version":"126-2ubuntu0.1"},{"binary_name":"libpolkit-gobject-1-0","binary_version":"126-2ubuntu0.1"},{"binary_name":"libpolkit-gobject-1-dev","binary_version":"126-2ubuntu0.1"},{"binary_name":"pkexec","binary_version":"126-2ubuntu0.1"},{"binary_name":"polkitd","binary_version":"126-2ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:25.10","cves":[{"id":"CVE-2025-7519","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"low","type":"Ubuntu"}]},{"id":"CVE-2026-4897","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8173-1.json"}}],"schema_version":"1.7.5"}