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{"acknowledgement": "Red Hat would like to thank the Xen project for reporting this issue. Upstream acknowledges Jan Beulich (SUSE) as the original reporter.", "bugzilla": {"description": "xen: broken x86 shadow mode refcount overflow check (XSA-249)", "id": "1518657", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1518657"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "status": "draft"}, "details": ["An issue was discovered in Xen through 4.9.x allowing guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging an incorrect mask for reference-count overflow checking in shadow mode."], "name": "CVE-2017-17563", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "xen", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2017-12-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2017-17563\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-17563\nhttp://xenbits.xen.org/xsa/advisory-249.html"], "threat_severity": "Important"}