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{"bugzilla": {"description": "xen: bad error path in GNTTABOP_map_grant (XSA-316)", "id": "1823925", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1823925"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-393", "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.", "A flaw was found in Xen through versions 4.13.x. 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 initialized 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 which will crash a Linux based dom0 or backend domain. The highest threat from this vulnerability is to data confidentiality."], "name": "CVE-2020-11743", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "kernel-xen", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2020-04-14T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-11743\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-11743"], "threat_severity": "Moderate"}