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{"bugzilla": {"description": "xen: bit iteration mishandling allows Arm guest OS users to cause a DoS", "id": "1801083", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1801083"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-119", "details": ["An issue was discovered in Xen through 4.12.x allowing 32-bit Arm guest OS users to cause a denial of service (out-of-bounds access) because certain bit iteration is mishandled. In a number of places bitmaps are being used by the hypervisor to track certain state. Iteration over all bits involves functions which may misbehave in certain corner cases: On 32-bit Arm accesses to bitmaps with bit a count which is a multiple of 32, an out of bounds access may occur. A malicious guest may cause a hypervisor crash or hang, resulting in a Denial of Service (DoS). All versions of Xen are vulnerable. 32-bit Arm systems are vulnerable. 64-bit Arm systems are not vulnerable."], "name": "CVE-2019-19581", "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": "2020-02-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-19581\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-19581\nhttps://xenbits.xen.org/xsa/advisory-307.html"], "threat_severity": "Moderate"}