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{"acknowledgement": "Red Hat would like to thank the Xen project for reporting this issue.", "bugzilla": {"description": "xen: stack corruption from XSA-346 change (XSA-355)", "id": "1902766", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1902766"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-193", "details": ["An issue was discovered in Xen through 4.14.x allowing x86 HVM guest OS users to cause a denial of service (stack corruption), cause a data leak, or possibly gain privileges because of an off-by-one error. NOTE: this issue is caused by an incorrect fix for CVE-2020-27671.", "An off-by-one flaw was found in one of the two patches for CVE-2020-27671 (XSA-346). This flaw allows malicious x86 HVM and PVH guests to cause host data corruption and data leaks, resulting in a denial of service or potential privilege escalation. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability."], "mitigation": {"lang": "en:us", "value": "Avoid passing through physical devices to untrusted guests."}, "name": "CVE-2020-29040", "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": "2020-11-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-29040\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-29040\nhttps://xenbits.xen.org/xsa/advisory-355.html"], "threat_severity": "Moderate"}