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{"acknowledgement": "Red Hat would like to thank Xen project for reporting this issue.", "bugzilla": {"description": "kernel: xen: Several long latency operations are not preemptible", "id": "956163", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=956163"}, "csaw": false, "cvss": {"cvss_base_score": "5.2", "cvss_scoring_vector": "AV:A/AC:M/Au:S/C:N/I:N/A:C", "status": "draft"}, "details": ["Certain page table manipulation operations in Xen 4.1.x, 4.2.x, and earlier are not preemptible, which allows local PV kernels to cause a denial of service via vectors related to \"deep page table traversal.\""], "name": "CVE-2013-1918", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Affected", "package_name": "kernel-xen", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/a:redhat:enterprise_mrg:2", "fix_state": "Not affected", "package_name": "realtime-kernel", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2013-05-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2013-1918\nhttps://nvd.nist.gov/vuln/detail/CVE-2013-1918"], "statement": "This issue did affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5.\nThis issue did not affect Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG 2.\nThe risks associated with fixing this bug are greater than its security impact. This issue is not currently planned to be addressed in future kernel-xen updates for Red Hat Enterprise Linux 5. Using fully virtualized (HVM) guests, or PV guests with trusted kernel/administrator avoids this issue.", "threat_severity": "Moderate"}