{"id":"UBUNTU-CVE-2019-20808","details":"In QEMU 4.1.0, an out-of-bounds read flaw was found in the ATI VGA implementation. It occurs in the ati_cursor_define() routine while handling MMIO write operations through the ati_mm_write() callback. A malicious guest could abuse this flaw to crash the QEMU process, resulting in a denial of service.","modified":"2025-07-16T07:19:09.240890Z","published":"2020-12-31T01:15:00Z","withdrawn":"2025-07-18T16:45:36Z","upstream":["CVE-2019-20808"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-20808"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-20808"}],"affected":[{"package":{"name":"qemu","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/qemu@1:4.2-3ubuntu6.3?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:4.2-3ubuntu6.3"}]}],"versions":["1:4.0+dfsg-0ubuntu9","1:4.0+dfsg-0ubuntu10","1:4.2-1ubuntu1","1:4.2-1ubuntu2","1:4.2-3ubuntu1","1:4.2-3ubuntu2","1:4.2-3ubuntu3","1:4.2-3ubuntu4","1:4.2-3ubuntu5","1:4.2-3ubuntu6","1:4.2-3ubuntu6.1","1:4.2-3ubuntu6.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-block-extra"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-block-extra-dbgsym"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-guest-agent"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-guest-agent-dbgsym"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-kvm"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-arm"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-arm-dbgsym"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-common"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-common-dbgsym"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-data"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-gui"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-gui-dbgsym"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-mips"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-mips-dbgsym"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-misc"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-misc-dbgsym"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-ppc"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-ppc-dbgsym"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-s390x"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-s390x-dbgsym"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-sparc"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-sparc-dbgsym"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-x86"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-x86-dbgsym"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-x86-microvm"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-x86-microvm-dbgsym"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-x86-xen"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-system-x86-xen-dbgsym"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-user"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-user-binfmt"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-user-dbgsym"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-user-static"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-user-static-dbgsym"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-utils"},{"binary_version":"1:4.2-3ubuntu6.3","binary_name":"qemu-utils-dbgsym"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-20808.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}