{"id":"CVE-2020-11743","details":"An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of a bad error path in GNTTABOP_map_grant. Grant table operations are expected to return 0 for success, and a negative number for errors. Some misplaced brackets cause one error path to return 1 instead of a negative value. The grant table code in Linux treats this condition as success, and proceeds with incorrectly initialised state. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to map a grant, it hits the incorrect error path. This will crash a Linux based dom0 or backend domain.","modified":"2026-03-12T23:43:47.248447Z","published":"2020-04-14T13:15:12.970Z","related":["SUSE-SU-2020:1124-1","SUSE-SU-2020:1138-1","SUSE-SU-2020:1139-1","SUSE-SU-2020:1634-1","openSUSE-SU-2020:0599-1","openSUSE-SU-2024:11520-1"],"references":[{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00006.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5M2XRNCHOGGTJQBZQJ7DCV6ZNAKN3LE2/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NVTP4OYHCTRU3ONFJOFJQVNDFB25KLLG/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YMAW7D2MP6RE4BFI5BZWOBBWGY3VSOFN/"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202005-08"},{"type":"ADVISORY","url":"https://www.debian.org/security/2020/dsa-4723"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2020/04/14/3"},{"type":"EVIDENCE","url":"http://xenbits.xen.org/xsa/advisory-316.html"},{"type":"EVIDENCE","url":"https://xenbits.xen.org/xsa/advisory-316.html"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"4.13.0"}]},{"events":[{"introduced":"0"},{"last_affected":"4.13.0-rc1"}]},{"events":[{"introduced":"0"},{"last_affected":"4.13.0-rc2"}]},{"events":[{"introduced":"0"},{"last_affected":"32"}]}],"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-11743.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}