{"id":"UBUNTU-CVE-2025-20234","details":"A vulnerability in Universal Disk Format (UDF) processing of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to a memory overread during UDF file scanning. An attacker could exploit this vulnerability by submitting a crafted file containing UDF content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the ClamAV scanning process, resulting in a DoS condition on the affected software. For a description of this vulnerability, see the .","modified":"2026-04-22T15:33:01.471422Z","published":"2025-06-18T17:15:00Z","related":["USN-7615-1","USN-7615-2"],"upstream":["CVE-2025-20234"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-20234"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-20234"},{"type":"REPORT","url":"https://blog.clamav.net/2025/06/clamav-143-and-109-security-patch.html"},{"type":"REPORT","url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-udf-hmwd9nDy"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7615-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7615-2"}],"affected":[{"package":{"name":"clamav","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/clamav@1.4.3+dfsg-0ubuntu0.20.04.1+esm1?arch=source&distro=esm-infra/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.3+dfsg-0ubuntu0.20.04.1+esm1"}]}],"versions":["0.101.4+dfsg-1ubuntu1","0.102.1+dfsg-1ubuntu1","0.102.1+dfsg-2ubuntu1","0.102.1+dfsg-2ubuntu2","0.102.2+dfsg-1ubuntu1","0.102.2+dfsg-2ubuntu1","0.102.3+dfsg-0ubuntu0.20.04.1","0.102.4+dfsg-0ubuntu0.20.04.1","0.103.2+dfsg-0ubuntu0.20.04.1","0.103.2+dfsg-0ubuntu0.20.04.2","0.103.5+dfsg-1~20.04.1","0.103.6+dfsg-0ubuntu0.20.04.1","0.103.8+dfsg-0ubuntu0.20.04.1","0.103.9+dfsg-0ubuntu0.20.04.1","0.103.11+dfsg-0ubuntu0.20.04.1","0.103.12+dfsg-0ubuntu0.20.04.1"],"ecosystem_specific":{"availability":"Available 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required","binaries":[{"binary_name":"clamav","binary_version":"1.4.3+dfsg-0ubuntu0.24.04.1"},{"binary_name":"clamav-base","binary_version":"1.4.3+dfsg-0ubuntu0.24.04.1"},{"binary_name":"clamav-daemon","binary_version":"1.4.3+dfsg-0ubuntu0.24.04.1"},{"binary_name":"clamav-docs","binary_version":"1.4.3+dfsg-0ubuntu0.24.04.1"},{"binary_name":"clamav-freshclam","binary_version":"1.4.3+dfsg-0ubuntu0.24.04.1"},{"binary_name":"clamav-milter","binary_version":"1.4.3+dfsg-0ubuntu0.24.04.1"},{"binary_version":"1.4.3+dfsg-0ubuntu0.24.04.1","binary_name":"clamav-testfiles"},{"binary_name":"clamdscan","binary_version":"1.4.3+dfsg-0ubuntu0.24.04.1"},{"binary_name":"libclamav12","binary_version":"1.4.3+dfsg-0ubuntu0.24.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-20234.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"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"}]}